A murder appears to be a suicide with very little evidence.

Grissom, newly appointed head of the crime lab, investigates the supposed suicide of a jackpot-winner. Meanwhile, Warrick has to deal with the fact that the shooting of rookie CSI Holly Gribbs was due to his failure to supervise her.

The search is on for a abducted woman while a hit and run death of a little girl is investigated.

A severed leg is found in a lake while a fraternity pledge goes badly.

A young man is found naked and dead in the desert.

Department protocol is violated when Catherine investigates her ex-husband's rape accusation.

The team is called to a suburban house where the whole family, except the two daughters, have been murdered with no apparent motive.

When a man is found dead in his bathtub with a tape recorder telling that he has committed suicide, the CSI team recalls the case of Royce Harmon that was not well resolved. Grisson, Catherine and Sara investigate the case that becomes more complicated when Grisson's fingerprint is found in the scene crime. Meanwhile, Warrick and Nick investigate the case of a man that was found buckled in the back seat of his car in a dam in coma and they bet whether it was a robbery or there was a phantom driver that stole the victim.

The CSI team is summoned to investigate the death of the first-class passenger Tony Candlewell in twelve hours because of a jurisdiction problem. Candlewell has contradictory evidences of aggression and defense, and the first class passengers are secluded in the airport and interviewed. But Catherine and Brass note that they are hiding information. Meanwhile, in the autopsy, the coroner learns that Candlewell had undiagnosed encephalitis, the reason of his berserk behavior. When they find shoe prints on the back of his jacket, the passengers Lou Everitt, Max Valdez, and Dr. Kiera Behrle .are considered prime suspects. The team interviews the blind Mr. Cash that was near the incident and using dummies later, they represent the statements and come to a conclusion of the case.

Sara and Grissom investigate the death of a woman, Kaye Shelton, found wrapped in a blanket in the mountains. With no way to confirm the time of death, Grissom relies on the insects found on her body to establish a timeline. Catherine and Warrick work on a case of a stolen painting. Nick works solo on a case of a missing wife.

While investigating the disappearance of Margaret Shorey at a supermarket, Grissom and Catherine stumble upon a serial killer who claims to have killed five women in supermarkets located along the I-15. Sara and Warrick are given the case of the death of a man who, his brother claims, was killed by a burglar. Sara soon suspects that the brother is not telling the truth. Nick is specially requested to solve a case of harassment.

Grissom receives a video tape from an inmate called Frank Damon who is on trial for the arson which resulted in his wife and son's death. On the tape, Damon claims that he is innocent and asks Grissom to help him. Grissom agrees to re-examine the evidence, despite knowing that this will anger Ecklie who originally worked on the case. Nick and Catherine, meanwhile, work on the case of a young man found shot in the head inside his car.

A bomb in a brief case goes off in the lobby of an office building. The team must piece together all the parts of this bomb to look for the maker's signature. Nick becomes involved in a crime after spending a night with a woman who ends up dead the next day.

A human bone is found in the desert accidentally by a dog playing fetch with a man and his son. Grissom and Catherine assemble a team to comb the area for more bones. Back at the lab, they piece together the skeleton and determine that body was cut to pieces. From his teeth, the deceased is identified as a 70-year-old Mel Bennett. Catherine and Grissom pay a visit to his wife, who claims that her husband is at a nearby store. Sara and Warrick are called to a motel where a male stripper is found dead on the bed. The room is registered to a woman who recently threw a bachelorette party for her friend.

The team arrives at a charity fund-raiser being held at the house of Portia Richmond, an ex-show girl who became very successful, where a body is found floating in the swimming pool. Portia herself is absent from the scene. The two hosts, Patrick and Amanda Haynes, claim that she is on vacation in Europe. Warrick works on a case of a mob shooting. The deceased is found in a glass elevator with a quarter stuck in the bullet wound on his forehead.

A Jane Doe is brutally attacked and raped before being left to die on the side of the road. With two bullets lodged in her brain, she is in a deep coma. Catherine and Warrick work on an open case of a man killed by his neighbor. The statements from the accused and the deceased's wife contradict each other.

A thief is found dead from blunt force trauma to his head in a pottery store where he was evidently trying to crack a safe. The team dusts the store and finds the fingerprint of a girl who has been missing for the last 20 years. Sara and Warrick find what's left of an old woman in her rocking chair. The two believe that they are witnessing a case of spontaneous human combustion. To prove it, Sara decides to conduct an experiment by herself.

A couple walks out of a fancy restaurant to their car. They are attacked and killed. When the team arrives on the scene, the only eye-witness is a young man who stayed behind to give his statements. Catherine investigates the collapse of an apartment building which resulted in the death of three elderly people.

A kidnapping case becomes unusually personal to the usually detached Grissom. The 4-month old baby, Zach Anderson, was allegedly kidnapped from his home. A ransom note, found by his mother, is left in his crib. Many things seem strange about this case as more evidence are analyzed. When Zach's body is found on a nearby golf course, the team is sure that his death is no mere accident.

Grissom, Sara and Warrick investigate the apparent hit and run of a young man...they soon discover he was deaf. Meanwhile, Nick and Catherine are attempting to solve a mass murder in a coffee shop.

Catherine gets emotionally involved while investigating the death of a six-year old girl at a carnival. Grissom, Nick and Warick take on the case of a jogger who was apparently attacked by an animal who knows how to use a scalpel.

A head is found in the trunk of a car.

There's a serial killer on the loose in Las Vegas. Since this is a very high-profile case, the sheriff brings in the FBI to help. This annoys Grissom very much as the FBIs like to assume many things while he prefers to let the evidence speak for itself. Due to his refusal to cooperate, he is taken off the case. Grissom's team, however, knows better and keeps their boss informed on the details.

Tony Braun, the son of Las Vegas mogul Sam Braun, is found dead in his home, apparently victim of a drug overdose. But as the scene lacks all evidence normally connected to an overdose, the team soon suspects murder.

The detectives hunt for clues relating to a missing college freshman. Their hope of finding her alive diminishes as all of their leads on her turn cold.

A construction worker falls off a tall building. Forensics determines that he died prior to the fall. Another case involves a boy who suffocates to death at his therapist's house late in the night.

Shameless yet rather popular "cool" high-school bully Barry Shickle is found shot in the boys' bathroom. Shy Dennis Fram, a favorite daily victim, was at his wits' end. The school authorities couldn't help, but his sassy sister expected her lover, the coach, to pull Barry in line. Destitute veteran Lt. William "Moses" Cartson's corpse is found dumped in a woodland. He was considered a bothersome beggar, especially by a bouncer.

A scuba diver (at least a man who dresses like one) is found dead, fully equipped with an oxygen tank, on a tree in a burned forest.

A woman is found dead at a spa while a young man is found burying dead bodies.

A woman is found dead in a locked room while another died when her car is hit by a train.

The death of a woman named Mona whose body was dumped in a sand pit leads Grissom and Catherine to a fetish club run by Lady Heather. Since Mona was a dominant, Lady Heather was surprised that her employee was tortured and suffocated to death. This leads Grissom to conclude that the victim was a 'switch', someone who could play both the dominant or the submissive role.

A casino was brutally but clumsily robbed by at least four trigger-happy fiends, the men of which wore female wigs. Painstaking identification efforts lead to ex-con serial killer Tammy Felton and accomplices, but one by one is found murdered themselves. The solution comes only after links are found with the bizarre shooting of a desert hamlet's only store's clerk, discovered by state trooper William Spencer, who messed up the crime scene despite long experience.

The investigation of the death of a petty con man/drug mule leads the CSI team to Brass' daughter Ellie.

Major home developer Robert Fairmont is found unconscious in a hotel elevator, probably staged. Widow Julia knew about his serial adultery and approved his organs to be donated and the rest of his body cremated, having been released as he died naturally of an aneurysm, but the doc may have overseen heavy metal poisoning. Dandruff traces to his suspiciously devoted secretary and confidant Claudia Gideon. The ladies have a surprising common past.

When a young woman riding a horse finds a body of a woman inside a pipe in a construction site, Grissom and his team investigate the murder. Soon they find another woman's body and coroner Dr. Albert 'Al' Robbins notes that the women are very different despite being sisters. Their further investigation indicate the Donna Marks was a reclusive woman, maybe agoraphobic, while Joan Marks had a different behavior. Meanwhile, Catherine and Nick investigate the murder of the hunter James Jasper in the woods. James was an insurance broker and an experienced hunter, but was not wearing the safety vest. Catherine, Nick and Detective Vega learn that Jasper and his wife Linda had lost their jobs. When they find a one-million dollar life insurance on behalf of Linda, his wife becomes their prime suspect.

A staged suicide harks the return of a serial killer. Catherine and Gil Grissom, while at court, finds the the residing judge looks exactly like this killer. Grissom investigates the judge's past and finds a startling answer.

Wealthy Roy Logan acts suspiciously when withdrawing $1,000,000 cash and his blood on his hands, but must be released for lack of a crime. When Catherine rushes after him with his spectacles, she gets a phone-call and is shown a severed finger proving Logan's adulterous lover Amanda Freeman was kidnapped. Logan ignores her advice, almost greedily handing over the ransom without proof of life, and Amanda is found where indicated- murdered days before.

A body is found in the body farm. He died from what looks like a bullet wound, yet Dr. Robbins and Grissom can't find any bullet fragments. Instead, they found bits of ground beef inside the wound track. The team links this death to an arson case. The investigation takes a turn when the 12-year-old daughter of the deceased's fiancée has been a victim of sexual assault for some time. Back at the lab, Sara asks for a 6-month leave, citing that she doesn't feel at ease at work with her co-workers, especially with her boss, Grissom.

An ice hockey player dies during a game.

Grissom studies Ananda's Vegas Buddhist monastery where four Thai monks were fatally shot in the forehead. Forensics also show the presence of hostile restaurant owner Peter Hutchins Sr. and his son, Pete Jr. Eventually, possible theft is considered. Catherine's mentor Jimmy Tadero falsifies evidence concerning the case of violent repeat-offender Dwight Kelso, who maintains his innocence on his deathbed.

A tour bus heading to Las Vegas skids off the highway, leading to many deaths and even more injuries. The team suspects that this is no mere accident.

A young woman is found dead inside a heavily secured house. The position of her body strikes a chord in Nick's memory, prompting him to believe that he might be the next target.

An old lady is found dead with a stab wound in her chest. There are over 20 cats in her house.

Grissom and Sidle investigate the death of someone who was buried in a shallow grave in a park and covered in lye. The autopsy reveals that the victim was struck by a car in the last 72 hours and bled to death. There was no blood at the grave site, however. The accident is traced to a young lawyer who has just started as an associate with a major law firm. Stokes looks into the death of Stacy Warner who is found in the middle of the desert but is determined to have drowned. She was a an extreme sports enthusiast out on a challenging trek but she seemed ill-prepared for the route she took.

Las Vegas's retired police commissioner Duke Rittle was tortured to death after an 'exclusive' party. The ex-con who drove him is found murdered in the car's trunk, but not the last on Grissom's trail. Rittle's young daughter Sasha is missing and the suspect, a socialite chameleon, is seen on a private flight to Miami. Grissom sends Catherine there. Luckily Lieutenant Horatio Caine of the Miami CSI team takes brilliant charge, realizing it's the MO of a Florida serial killer of socialite couples, who spared the girl but eliminated all other witnesses and clearly isn't done yet, even sets a trap for the police.

The body of a woman is found in a shopping cart, wrapped in a blanket with her mutilated face protruding out. The woman was a model named Ashley James whose face can be found all over Las Vegas, on billboards and magazine covers.

A world-famous poker champion drops dead in the middle of a game. He appears to have had a heart attack. Outside of the city, Nick and Catherine investigate the death of a young street racer.

Hollywood sex symbol Tom Haviland admits having had sex with a girl who is found in the same casino hotel, throat fatally pierced with a corkscrew. As he failed to clean up, the team quickly gathers enough evidence for a murder charge. His top lawyer chooses to demand a near-instant trial, leaving CSI almost no time to work out the part of Tom's buddy and a second victim, actually the first murder. Meanwhile Grissom's mentor and predecessor, Dr. Phillip Gerard, uses all his forensic expertise to question every move they make and discredit team members.

The owners of a house placed on sale are found dead, their bodies discovered by two interested buyers. Sara is working solo on the death of a cheerleader at a high school.

A dwarf is found dead, hanged in an auditorium during an annual convention for little people. Working on a case of murder during a home invasion, Catherine is attacked by the perpetrator while processing the scene.

During a magic show, a female participant really disappears during a disappearing act. Nick and Catherine investigates the death of a rock star found on his tour bus with a needle stuck in his arm.

On the day of convicted serial killer-rapist John Mathers's execution, a new case following his MO causes a stay after countering the already administered lethal injection and urgent forensic (re-)examination. It was Catherine's first case leading to death row. The most modern techniques, even requiring federal equipment not available to Greg, show another killer was at work and probably one was a copy-cat, but the question remains in which order, as that may or not discharge Mathers.

Boxer LaRoi Steele didn't survive his third fight against Javier Molina, whom he defeated in both earlier encounters. Grissom works out what happened exactly and why after learning how that Vegas show discipline really works. Nick wanted a solo case but isn't tickled-pink with a jewelry theft, yet does it well enough to counter abuse from ingrate victims. A gang fight involving an arrogant 'modern' gangster turns out to tie in as well.

A murder is caught on tape. With no body or a crime scene, Sara, Warrick and Catherine must get as much information as possible from the grainy 16 mm film. Grissom and Nick must brave a colony of fire ants to recover a body.

A taxi driver accidentally runs over a teenage boy. He is later brutally beaten by a gang who thinks he is running away. Grissom and Sara works on the case and finds that the boy was dead prior to being hit from a stab wound.

A body falls out of the sky, literally. The cause of death is suffocation but the body bears no signs of strangulation.

When the supervisor of a meat-grinding facility finds a hand in a grinder, Grissom, Catherine and Capt. Brass investigate the case. Grissom is able to take the finger print of the hand and learns that the body is from a chef of the five stars restaurant Debreef. Grissom and Catherine head to the kitchen of the restaurant, where they find a team tied by a code. Meanwhile, Warrick and Sara investigate the apparent suicide of a bipolar woman. They learn that she was a very violent person when stopped using lithium and hated by many people. They suspect she might have been murdered in accordance with the crime scene..

When a group of bird watchers sees a raven with an eyeball in its nest, the CSI team investigate the case. They trace a radius from the nest and using the evidences, they find the location where the corpse may have been dumped. Catherine, Sara, Nick and Capt. Brass find the body and they identify the body. The prime suspect is the ex-husband of the victim. Meanwhile, Grissom, Warrick and Dr. Robbins find that the car seller Fred Stearns is not dead but dies later. They suspect that one of his colleagues may have killed him.

Matt Phelps sends his two kids to bed, and out of the blue, there is a drive-by shooting and his daughter Aimee is shot and killed in her bed. Grissom, Warrick and Capt. Brass investigate the case and Grissom learns that Matt Phelps is Warrick's mentor and friend. Warrick's investigation is conducted based on his emotions instead of on the evidences with serious consequences for Matt and a suspect. Meanwhile, Nick and Sam Vega investigate the mysterious death of a boss of a four-men Internet service company in the air-conditioned servers' room. They find many secrets in the team but no suspect and no murder weapon. Until Nick observes the duct of the air-conditioning.

When Joanne Crooks is assaulted without rape at home, Catherine, Grissom, Nick, Warrick and Capt. Brass assume the investigation. They find fingerprints on the windows and they learn that the criminal is escalating in his crimes. They fear that he soon will rape his victim since this was his first break in. Meanwhile, Sara learns that the paraplegic prosecutor Melissa Winters will be submitted to a surgery of high risk. Three years ago, Winters was shot on the neck in a home invasion where her husband as killed, but the murderer has not been found. Now the bullet has moved and she needs the surgery. Sara decides to reopen the cold case using the bullet withdrawn in the surgery to try to find the criminal.

When a body is found in a foam party, he is identified by Grissom and Capt. Brass as the male prostitute Trey Buckman. Meanwhile, Catherine and Nick investigate a decomposed body of the also male prostitute Croix Richards in his apartment. Catherine receives a phone call from Eddie's phone, who is with Lindsey, with poor reception, but soon she learns that Lindsey is screaming and she leaves the crime scene to seek out her daughter. She finds Lindsey in a car in the water but she rescues her. Sara and Det. Vega investigate the case and they suspect that Eddie is dead. Meanwhile Grissom concludes that both victims may have been dead by insulin and they were employees of Lady Heather. Grissom and Catherine visit the suspect Rebecca and meet her husband Steven McCormick that tells to them a weird story. Then he goes with Capt. Brass to Lady Heather's house. Grissom has a personal moment with Lady Heather and when he learns that she is diabetic, he requests a warranty to get her insulin.

A man driving with a wooden stake in his head dies in front of a casino.

An elderly lady drives her car recklessly into a café for no apparent reason. Meanwhile, a wife dies of carbon monoxide poisoning while her husband does not even though he was sleeping right next to her.

A really badly decomposed body of a man is found in a chemical waste barrel. The markings on the barrel indicates that it came from a warehouse, now used as an arena for specially-built remote-controlled robots to destroy each other.

A man is found stabbed to death in an art house cinema while a young shooting victim is found in a storage room with a bizarrely wide bullet hole pattern.

While performing on the stage, the comedian Dougie Max dies. Grissom, Catherine and Capt. Brass investigate the case and Grissom and his team conclude that he was poisoned by the expensive bottled water Innoko. When a teenager dies in a convenience store, Warrick is assigned by Grissom to investigate the case, and soon he finds that the youngster had drunk Innoko water. Grissom finds that the bottles came from the same lot, and was not a tampering case. Meanwhile, Brass asks Nick to reopen the case of Shelley Stark, who died in an accident in a bathtub and Brass did not call any CSI investigator. He has just seen her husband with a hot woman driving a Ferrari and he is intrigued, since the man was inconsolable. Nick and Sara reopen the case and find new evidences.

When a private jet lands after a party, they find the trainer Lori Hutchins dead apparently stomped by the horse in the cargo bay. Grissom, Catherine, Nick and Capt. Brass investigate the case. The horse is in quarantine and the veterinarian Dr. Stevens help Catherine to collect material from the animal. They interview the owner of the jet, guests and crew and find two tranquilizers dart in the cargo bay. When the horse mysterious die, Dr. Robbins make the autopsy and they learn what happened in the flight. Meanwhile, Sara, Warrick and Det. Lockwood investigate the suicide of a teenager in the middle of the desert. When they find a second body dead in the same circumstances, they believe it was a kind of "Romeu and Juliet" pact of the younger. Then they identify the couple, Toby Wellstone and Jill Frommer, and interview her mother trying to understand why they died in a distant place and separated from each other.

A couple of high school students find the body of a woman in the press box of football field. Grissom, Nik, Sara and Capt. Brass investigate the case and they learn her identity, the waitress Alison Carpenter. Their further investigation lead them to the former prison inmate Jason Kent, who has recently been released. Alison was his girlfriend and was having sex with the drug dealer Jesus to postpone the debt of Jason with him. Meanwhile, Greg's DNA laboratory explodes and Sara and him are injured. Warrick and Catherine are assigned to investigate the case and find the responsible for the accident.

A team of robbers heist the First Monument Bank and Detective Cyrus Lockwood is shot and murdered. The team investigate the case and find that the thieves wanted a specific safety deposit box in the vault. Meanwhile the driver of the getaway van is found dead in the vehicle, Larry Whiting. He was a former valet of the Rampart Casino, owned by Sam Braun. When they find the name of the owner of the stolen box, Benny Murdock, an Catherine recognizes the name.

Several couples are killed bloodily after a wild party night in the same luxury hotel with Cameron and Mandy Klinefeld, or rather one somehow forced to kill the spouse. Nick is pleased to bump into former college mate Kenny Richmond, who works there, until it seems buddy boy passed confidential information to the press, which could get Nick fired.

A grossly decomposed corpse in a bath tub is identified as frat student Daniel O'Hannissey. He was last seen in a bar, taking part in a brawl about team sports, but left apparently unhurt. Meanwhile, the serial couples killings investigation takes a sharp turn when both are murdered in their home, while the undercover police observation was diverted.

Fingerprints suggest a link between two home invasions, but it's hard to link either the victims or the logical suspects, who may all be innocent. The crucial survivor testimony proves the most tenacious problem. A toddler found and accidentally fired a murder weapon in the family's suburb garden. Its place is a mystery, being so overt and unrelated to the victim, a bounty-hunting has-been, until the team consults the sky.

During a week-log heat wave, corpses are found, mostly accidentally. A.D.A. Jeffrey Sinclair decides to 'make an example' of a workaholic father who forgot his baby-boy in his scorching-hot car with fatal result, but the team finds the couple lost a previous baby and may have murdered this one. Mark Young is missing since his teen date's fatal lake sports accident. A fat man on a crazy diet was electrocuted at home.

The discovery of a dead man in the wilderness in a fursuit leads to an investigation at the goings-on at a furry convention.

The sheriff of desolate town Jackpot calls in CSI for assistance after a severed head is found. The sheriff proves rather more cynical than helpful towards Grissom, unlike the veterinarian-coroner. The rest of the corpse is found buried to the shoulders alive, a Native American torture technique. Grissom triumphs over sabotage and works out the local reports and relevant secrets.

Because Warrick naively assumed simple uniformed cop Hal Watson would have arranged a search warrant, the crucial weapon in the rape and murder trial on a neighbor against Michael Fife is dismissed as evidence in court. A.D.A. Jeffrey Sinclair can only get a 24 hours delay to present new evidence to build the case again. Nick brilliantly smooths emotional waywardness from Sarah and Warrick. New clues expected to reconstruct the case against Fife actually indicate he's probably innocent. An alternative culprit must be found, starting from Fife's car where the bloody knife was planted.

Julie Waters, a dancer, has been missing for 6 days. A suspect, Howard Delhomme, calls the police and turns himself in. He refuses to talk to anyone but Catherine. Sarah and Nick want to work on this case because they see it as a career-making step. Grissom, to their anger and disappointment, hands the rein over to Catherine. Despite their initial antagonism, they all worked together to find the young girl.

Sheriff Rory Atwater is leaving the Orpheus hotel and witness a car bombing, where the driver, the valet and the bellhop die. Grissom and Catherine arrive to investigate the crime scene and gunshots start. Grissom finds that the bullets are in the trunk in bag. Nick and Capt. Brass help the investigation. Soon they learn that the driver is Air Marshall Adam Watson, and the car was rented in an agency. Nick puts together the pieces of the bomb, which was a pipe bomb connected to the car clock. Soon they conclude that the victim might have been the previous user of the rented car since the timer was not accurate. Meanwhile, Sara, Warrick and Det. Louis Vartann investigate the death of Amelia Reuben, who is the wife of the successful singer Myles Reuben. They conclude that Myles, his manager Sam Hopkins and a hotel waiter were the last persons to see Amelia alive, and the autopsy and Greg's investigation concluded that she was poisoned.

Teenager Brian Haddick is found on a construction site, skull fatally smashed, with an employee's hammer. Grissom's team checks on the construction crew as well as Brian's school crowd, stumbling on abused love and dirty practices. Another victim was killed by a bullet which literally fell from the sky.

A juror dies during a trial in a heavily guarded safe house. A four-year-old case of a missing woman is reopened when the woman's sister gives the CSIs new evidence she withheld during the original investigation.

When the nurse Debbie Marlin is found murdered in her bathroom, the CSI team investigates the case. They learn that Debbie was a promiscuous woman that used to date doctor. Her last boyfriend Dr. Michael Clark is missing and becomes the prime suspect of murdering her. However, their further investigation finds pieces of his body in plastic bags in several trash bins in an alley. Dr. Robbins concludes that the cuts have been made by a surgeon using probably a scalpel.

In the Mediterranean Casino, Ty Caulfield is speaking for guests that the casino will exhibit rare Japanese antiques from the Seventeenth Century owned by Mr. Yuri Yamamoto in the casino. Out of the blue, a woman cries and they see a body floating in the pool and a live wire at the edge. Grissom, Sara and Capt. Brass investigate the case and soon they find that the body is a CPR dummy. They hear the security alarm and find the guard wrapped up in duct tape, and the samurai sword is missing. They investigate the findings and return to the exhibition room to collect other evidences but the room is empty. The head of the casino security tells that the pieces have been transported to the casino vault to be in a secure place. Soon Grissom finds the sword hidden in an air duct and questions Yamamoto why a Nineteenth Century armor was together with the other pieces Surprisingly Yamamoto say that he has no armor in his collection. They go to the vault with Ty and find that all the casino money has been stolen, in a masterstroke. But their findings do not stop. Meanwhile, Catherine and Warrick go to an abandoned house with fame of haunted and find the corpse of Angela Sommerville with two holes in her jugular vein and drained without any blood. Further, there is no gore in the crime scene. Soon they learn that Angela used acrylic fangs and her friends belonged to a vampire "coven".

There is a heist in a supermarket with five casualties, including police officer Clay. The entire CSI team investigates the case. Officer Fromansky, Grissom's longtime foe and who killed the robbers and a civilian, claims that there was a third robber on the scene. However, the evidences do not corroborate with his testimony. The CSI proceed the investigation and conclude also that it was an inside job. Will they find the truth?

Although living in a well-protected gated community, the couple Mike and Laurel Trent are executed in front of their house by two masked killers. They were owners of the famous Acid Drop club among other properties. Grissom notes that Laurel was dragged out of the car, but Mike was dragged down the driveway in a place where everyone could see him. The whole team is assigned to investigate the case since the real state is large. Soon they find that the jewels have been robbed and Laurel had made porn films in the past with the production of Drake the Snake. Catherine goes to the Acid Drop and interviews the manager Chris Bezich first and Drake, who is bartender, later. Their further investigation shows that Mike's former partner Kyle Goode is suing him in the justice. When Grissom is summed to a murder case in an apartment, he finds evidences that will help him to resolve the case.

A man who works at a half-way house is found dead in an area filled with drug addicts and prostitutes at night. His belongings were stolen, from car to shoes. Another body is found wearing only his boxers, with signs of a clown's make-up.

While trying to pass a bus on the highway, an arm strikes the windshield of the car of a couple. Catherine, Nick, Sara and Capt. Brass investigate the crime scene and find pieces of a woman secured by white strips of clothes on the bottom of the bus that was carrying inmates from a prison to a church. They believe the woman was trying to flee from the correctional facility. Soon they learn that the victim is Antoinette "Baby Girl" Stella that would be released on the next month. Sara and Nick go to the prison to try to understand why Baby Girl decided to escape. Meanwhile, Grissom and Warrick investigate the murder of Adanto Adams who was stabbed to death at the home of his intellectually disabled brother Zero. Soon they meet Zero and his guardian Frank Samuels and they learn that Adanto has promised to his beloved brother Zero that they would be rich. Warrick gets the videotape of the casino where Adanto went to play blackjack and lost a fortune.

A strong and tall man follows another man in the casino to the parking lot. Soon the CSI team comes to the casino to investigate the murder of the man, Tony Sciarra, who was brutally beaten. They watch the tape of the surveillance cameras and see a shorter man stealing Tony's chips and being followed by him. When they identify the killer, Walter Darian, they arrest him; however, the guy attacks Grissom first in the interrogation room and then the guards that try to subdue him. Out of the blue, Walter is dead. Now, they investigate his belongings since he was an accumulator and find evidence that may lead them to another murder case.

There is a fire in a house and Catherine, Nick, Warrick arrive at the scene. An arson investigator tells them that there was a fire in the block ten days ago, maybe caused by a serial arsonist. The Abernathy family is rescued, but the daughter Sabrina that was not supposed to be at home is found dead. They begin their investigation looking for the origin of the fire and for suspects. Meanwhile, Grissom, Sara and Capt. Brass investigate the death of a man found dead in a hotel bathroom. In the autopsy, Dr. Robins finds a round tile with the letter in his throat, and five more tiles in his stomach. Brass identifies the victim and Adam Brenner from Florida that was in Las Vegas to participate in a logo game tournament. Soon Grissom learns that Adam was a top player and Grissom looks for opponents defeated by Adams that might be angry.

During the police marathon in Las Vegas, Grissom sees a runner outside the road and drives his car to the place, leaving Catherine alone. He finds a police officer dead. Dr. Robbins find that the victim was in excellent shape, but he had ingested two substances that combined killed him. Meanwhile, Sara, Warrick and Det. Louis Vartann investigate the murder of officers Manny Senteno and Patricia Fielding in a hotel room. Warrick's first impression is that might be a murder-suicide case. Soon they find fingerprints of the police officer Lydia Lopez and learn that she was lodged in the next-door room. When they look inside the room, it is completely trashed. Lydia says that she had sex with a Manny once a year during the marathon and she believes that her husband Archie Lopez might have followed her and trashed her room, but would never kill Manny and Patricia.

When a roller coaster derails in an amusement park, there are six victims in the parking lot. Grissom, Nick, Sara and Capt. Brass investigate the case and soon they find that five deceased persons were in the train, but the employee Jim Nevins died twenty-hours before with a head trauma. Grissom interviews the park chief engineer Woody and learns that the old roller coaster has good maintenance. Grissom shows a nut to Woody and he says that it would be impossible to cause the train derail since there are eight sets that would have to lose. Meanwhile, Catherine and Warrick investigate the murder of the thirteen-year-old Tessa Press that was found murdered but not raped. Her mother Raina tells them that Tessa used to go to the house of a friend twice a week and she had assumed that her daughter was with her friend. Now they need to find what has happened to her.

The body of a young gambler is left at a neon graveyard. He died from two gunshots to the back of his head. Prior to his death, he won a lot of money from one of Sam Braun's casinos. This makes Grissom remove Catherine from the case.

When Linley Parker survives a rape attack, the CSI team investigates the case. Linley identify her aggressor Dr. Todd Coombs, but their DNA do not match and Todd is released despite the identification. His brothers become the suspects based on the DNA results, but they do not find the guilty. When Linley is murdered, the CSI team discovers new genetic condition in the case.

Greg has found a replacement in the DNA lab, Chandra Moore, and introduces her to the co-workers. Capt. Brass, Grissom and Greg, in his first case, investigate the death of an unidentified victim with a shot in the forehead in a shooting in the nightclub owned by Manny Brazil. He says that he does not know how the gun has passed through the metal detector. Catherine and Det. Louis Vartann investigate the murder of a woman covered in blood in a hotel room. The man, Carl Johnson, also covered in blood, tells to the detectives that he has never seen that woman before. Soon they learn that the victim is the stripper Nicole "Raven" Richards that drugged Carl to rob him. Warrick and Det. Chris Cavaliere investigate the death of Lance Frazer, a loser that died in the bathtub electrified by heat exchanger causing a short circuit in the motel. Soon Warrick learns that Lance hit a fifty-thousand-dollar jackpot on the previous night. Nick, Sara and Det. Travis investigate an "alien" buried in a shallow grave near the Area 51.

When a corpse is found in a storm drain gate, Grissom, Warrick and Catherine investigate the case. Warrick and Catherine follow the storm drain and find that the victim is the lifeguard Calvin Berkowitz and they believe he died "surfing" during the rainstorm. When they leave the place, a sewage worker shows some bones they have found while working. Soon they learn that other bones were found in the sewage drain and try to find the point of origin, while they also research the missing persons database. Capt. Brass talks to a resident of the neighborhood and he complains of a bully teenager, Owen Durbin. Soon his family becomes the prime suspect of the case.

When April Perez reports that her thirteen-year-old Alicia Perez has been kidnapped by an Afro-American man driving an old Buick, the CSI team investigate the scene and an Amber Alert is issued. Capt. Brass interviews the parents Sybil and Carlos and he learns that April had drug problem. Meanwhile, Grissom and Sara look through Alicia's room and Sara learns from Alicia's brother Daniel that his sister was in love with her schoolmate Jimmy Jones. When they meet Jimmy, the boy tells them that Alicia was upset since she would have to donate her kidney to Daniel and she liked to play soccer. When they find the body of Alicia dumped on the road, they make news discoveries about the case.

Dr. Robbins concludes that a woman covered with red blotches has not died of Ebola. In the autopsy, he learns that the woman is Julie Stern, who was recovering in the hotel from a cosmetic procedure. He also tells to Catherine that she had urine in her stomach and signs of heavy metal poisoning. Catherine and Nick interview her doctor, Tony Malaga, who owns an expensive clinic. When Dr. Robbins finds the same symptoms in the autopsy of Renita Loakes, they return to the clinic with a warrant to get their medical information. Meanwhile, Grissom, Sara, Greg and Capt. Brass investigate the death of Elliot Beckman, whose house was fumigated and his body was found inside. The exterminators tell them that the house was supposed to be empty when they released the gas.

When the body of Vanessa Keaton is found drowned in water fountain in a gated community and hit on the forehead, Grissom, Sara, Greg and Capt. Brass assume the investigation. Soon they learn that Vanessa was in a swingers' party, but the water in her lung is not from the fountain. They interview the owners of the house and guests and collect the water in the swimming pools to see if any of them match the water in the lungs of Vanessa. Mia examines the DNAs in the several condoms in the garbage bin. Meanwhile, Warrick, Nick and Det. Chris Cavaliere investigate the murder Mr. Basengi, the landlord of a video arcade. They find an eviction notice to the tenants are Melissa Poolie and Charlie Pinscher that become prime suspects. They visit Charlie that tells that Melissa was his girlfriend and left him with the rent. They learn from Marty Gleason, a member of the crime scene cleanup, that the place has a decomposed smell and Warrick and Nick find the body of Melissa hidden in a game and Charlie is brought back to the interrogation room.

When a group of fraternity members find a spot covered by maggots, Grissom investigates the scene and believes a student is providing the flesh to the maggots. Based on the uniform size of the bones and woods, Nick and Grissom believe a mulching machine was used to discard the body, and soon they find evidence in the machine. Based on a fingernail found in a garbage bag, Catherine concludes that the Blue Painter Killer is back. Now the entire team is working on the case.

While in a dinner party to celebrate the retirement of Director of Robert Cavallo and the promotion of Conrad Ecklie, Grissom is summoned by Capt. Brass to investigation a homicide in the Olympia Hotel. He stumbles upon Ecklie's right hand Sofia Curtis in the elevator and they go with Brass to the suite where they see the body of the teenage Nicole Jensen next to vomit. Soon they learn that the suite was reserved by the hotel's owner Charlie Macklin for his daughter Janelle. The McKinley High School is giving a homecoming party in the ballroom, but Janelle is giving a private party in the suite. Catherine, Nick and Warrick join the investigation and interview the guests. They note that Janelle is missing and they learn that two masked kidnappers have abducted Janelle. When Catherien and Sheriff Atwater interview Charlie, he tells them that he knows his daughter and that was a prank to get his attention. The CSI team proceeds the investigation and find the truth of what happened during the night.

While driving her convertible at high-speed in the highway, a woman is stopped by a patrolman. Catherine and Grissom arrive later to the highway where the woman was found with slit throat and slashed genitals in her car. They also find a camcorder with no tape on the floor. The entire team investigate the case and Warrick and Sara find documents in the car, showing that the victim is Wendy Garner and the car's registration and the driver's license in the name of Walter Clancy. When Dr. Robbins finds a prostate in the victim, the team learns that she was a transsexual, and soon concludes that Wendy and Walter were the same person. When Grissom and Brass investigate Wendy's fiancé Aaron Laner, they learn that he does not know that Wendy was a transsexual. The team also interview her fellow dancers and learn that Dr. Mercer is the responsible for most of the transsexuals' operation. However, the doctor tells Catherine and Warrick that he refused to operate Wendy since she wanted to jump steps of the procedure required by the law. Now they are looking for the surgeon that might have operated Wendy.

While giving his testimony in a retrial, Grissom sees fingerprints on a matchbox that he does not recall. The victim Max Larson was found dead I his hardware store hit by a wrench. He requests a recess to the DA and reopens the investigation of the case. He follows the protocol and assigns Catherine, Warrick and Nick to investigate the case again and why they have missed the fingerprint in their investigation. Ecklie asks Sofia to investigate Grissom's cases and begins a witch hunt in the laboratory. Meanwhile, Sara, Greg and Det. Louis Vartann investigate the case of a John Doe, who died after shooting his own leg. When they succeed to find the register of the gun, they find clue of another case.

Grissom, Sofia and Greg investigate a gang shooting with two victims. Out of the blue, Greg finds the body of a young boy dumped in a trash bin. Sara and David Phillips join the investigation. Dr. Robbins notes in the autopsy that the boy was around five years old, was abused with several recent fractures and died of starvation. A further investigation identifies the boy as Devon Malton and Sara and Capt. Brass visit the foster home where he lived with Lorna Tenney. Meanwhile, Catherine, Nick, Warrick and Det. Louis Vartann investigate the case of the prisoner Samuel Mendez that was beaten up in a riot in a cell and now is brain dead. Warrick sees a gun in the cell that was under Samuels body. Lt. Arthur Chen that is the responsible for the prisoners has an argument with Warrick when he comments about a sloppy police search and abuse of force. Soon they learn that Samuel Mendez is not the wanted criminal but an innocent namesake.

Greg is doing his final proficiency test and he has a case to solve. Ironically, he investigates the death of a Sherlock Holmes- wannabe, obsessive to the point of recreating the great detective's living room in his home. He died from a close-range gunshot wound. The murder weapon is not found in the scene although everything other pieces of evidence suggest that it was a suicide. Working under Catherine, Nick and Warrick works on a case of a dead guy found in his car which veered off the highway. Dr. Robbins cannot find the cause of death and it is left to the two detectives to solve the mystery.

When a delivery boy finds a severed head with the hair ripped off inside a newspaper stand, Catherine, Nick and Det. Sam Vega assume the case. In the autopsy, Dr. Robbins pull out a snake from her mouth and finds the serial number of her bridgework. The victim is identified as Veronica Juarez, and the investigators find a diploma from a university on the wall. They believe she is a gangbanger and they see a poster of the band Extremo. Nick and Det. Vega visit the club where Extremo is playing and they identify the victim as Carla. Soon they learn that the song that Extremo is playing is a ten-year-old narcocorrido that describes the way Veronica was murdered. Meanwhile, Greg, Sofia, Warrick and Capt. Brass investigate the murder of a man wearing and expensive suit shot in the head in the driver's seat of a handicap van. They identify the victim as Vincent Decarlo and they find that the victim was shot from a wheelchair. Soon they learn that the wheelchair belongs to Bonnie Bakerset, who lives in a nursing home, and a nice salesman has sold many things to Bonnie that has just died.

When a body is found at a construction site, Catherine, Warrick, Nick and Sara investigate the case. They dig the spot and Nick finds a third foot, indicating that there is a second body in the place. Grissom helps Catherine to get the bodies without damage out of the large block of tar using liquid nitrogen. Sara rebuilds the face of the upper victim with plaster and comparing the mold with photos of women victim of abuse, they identify her as Svetlana Melton. They interview Andrew Melton, her ex-husband that now is married with the Asian June. Meanwhile, Sara has a friction with Catherine and Ecklie suspends her, and asks Grissom to fire her.

When the young mother Lori Kyman is reported missing by her husband, Grissom and Sofia meets with Capt. Brass on the highway where her car was found with flat tire. Sara and Capt. Brass go to Lori's house to interview her husband Mark, and they find her best friend Amy Maynard. Lori's stepmother Diane Hoyt arrives and confirms Mark's alibi. Soon Greg finds that the valve of the flat tire in Lori's car was unscrewed leaking the air, and he finds prints. Meanwhile, Catherine, Warrick and Nick investigate the deaths of the hunter Rod Hollis with claws around his neck and a Kodiak bear in the woods. However, the animal is not native from the area. In the autopsy, Dr. Robbins finds that bear was shot twice, by Hollis' rifle and by a Magnum .357 that was used in a robbery and belongs to Aaron Colite. A microchip in the bear shows that he belonged to Clark County Zoo and was bought by a broker.

When the wealthy casino owner Bruce Eiger is found dead on the front steps of his mansion, Ecklie assigns the entire team to the case. They investigate whether Bruce has jumped, felt or was pushed off the second floor. In the autopsy, Dr. Robbins finds that Bruce was sodomite, with repeated insertions into his rectum. When they find a secret compartment in Bruce's mansion, they are forced to understand the bizarre world of Infantilism.

Catherine, Warrick and Nick investigate a shotgun killing in the desert. What they come across however is a beaver dam full of money. When they subsequently learn that the victim worked at setting the spread for sports betting, they think he may have a betting scam of some sort. Grissom, Sara and Greg investigate a death in a hotel where someone is found suffocated in his bed. He was staying in a hotel hosting a convention for overweight people and was quite popular with the ladies.

When the flight attendant Martha Krell is found dead and raped in her hotel room, Grissom, Greg, Sara and Capt. Brass investigate the case. They note that there is no luggage in the room that was cleaned and sanitized without any evidence. Ecklie tells Sara that he had a similar case five years ago, with the flight attendant Sue Stein. Sara notes that the present technology is able to retrieve the fingerprint from the previous case. Meanwhile, Catherine, Nick, Warrick and Det. Chris Cavaliere investigate the case of the death of the twelve-year-old Ty Hawkins, who has been beaten to death on his bed while sleeping. His fourteen-year-old brother Matt becomes the prime suspect to Det. Cavaliere and when Matt confesses the murder of his brother, Nick questions the way Det. Cavaliere conducted the interrogation. The CSI team proceeds the investigation and finds two other suspects: Ty's father Martin and the homeless Walter. Who might be the murderer?

A man is observing the sky with a telescope when, out of the blue, he is burned by a blaze. Grissom and Sara arrive to investigate the scene when Grissom finds a woman still live but completely burned. They believe it was arson and Sara uses the fingerprint in a broken bottle of cheap vodka to identify the truck driver Patrick Bromley. Meanwhile, Catherine, Warrick, Nick and Capt. Brass investigate the murder of the Stewart family, where the parents were shot and their five-year-old daughter Dani drowned in the swimming pull. Nick believes in the murder-suicide theory while processing the evidences. When they learn that the DNA in both cases belongs to the burned woman, they realize that the cases are the same.

When a Hummer in the wrong way runs over an old Fiero, Grissom meets Capt. Brass to investigate the scene. He learns that the Hummer's driver has fled and the Fiero's driver is alive in the hospital. At a car convention, when the host Mr. Daluca opens the curtains to show the latest RV model to the audience, there is a dead woman. Warrick and Det. Louis Vartann learn that the victim is the twenty-nine-year-old model Lisa Schumacher. Dr. Robbins tells Catherine that Lisa was asphyxiated and she had sex before her death. Daluca becomes their prime suspect. Meanwhile, the model Gwen that is working at the convention, goes to the house of her personal trainer Paul Charles to workout and sees him dead through the window. Greg and Sara investigate the crime scene while Dr. Robbins carries out the autopsy. When he sees a black substance in his eye, Hazmat takes Sara and Greg to the decontamination shower. When the body of a boy is found on a bus stop bench covered by a blanket in front of a laundromat, Nick investigates the case. Dr. Robbins tells Nick that the cause of death was asphyxia from heat damage. They identify the victim is Chase Ryan and Nick tries to understand what might have happened to the boy.

When the prostitute Dakota leaves the street of Los Angeles in a car for a program with a client, she never contacts her friend Jersey again. On the next morning, Jersey reports to the police that Dakota is missing. The attending officer does not pay attention to her complaint and she calls her father on the phone asking for help. Jersey is Ellie and her father is Capt. Brass, who asks for a leave to the sheriff to resolve family problems. He contacts his old friend and LAPD Captain Annie Kramer, who gives their police records to Brass and he learns that Ellie works on the streets and her last address. When the car is located with broken windows, Capt. Kramer call one local CSI investigator that brings Warrick that is in a conference with him. Kramer and Brass visits the owner of the car, Assistant City Attorney Todd Piccone, who has not reported that his car was carjacked. He becomes a suspect but The Powers That Be seems to be not interested in resolving the case.

When the inmate Robbie Garson is found dead inside his room, Grissom, Sara and Capt. Brass investigate the murder. They learn that the inmates are criminally insane and rapists, and they get their DNA. When Sara finds semen on his bed, Dr. Valerie Dino tells Sara that Robbie had been chemically castrated and could not ejaculate. In the autopsy, Dr. Robbins finds that Robbie had various thing in his stomach and the cause of death was asphyxiation and his head trauma happened a couple of hours later. Sara and Grissom finds that the pharmacist Leon Cadera was stealing expensive drugs and giving simple medication to the inmates. When they identity the recovered semen belonging to Adam Trent, they change the line of their investigation.

After a tough day at the work, Catherine invites Warrick and Nick to drink in a bar. She goes alone and meets Adam Novak, a stranger that fives his phone number in a matchbook. He offers to go to her car with her, they kiss each other and Adam turns brutal when she does not want to have sex with him. She hits her head on the door of the car and goes home. While sleeping, Catherine gets a call from Grissom and heads to the crime scene, where Alice Granger is found dead with a shot in her head. When Det. Vartann find her car nearby the bar where Catherine was, she goes with him to investigate. When she finds a matchbook in the belongings of Alice with a phone number, she heads home to find Adam's matchbook, but it has been thrown in the garbage. Their further investigation indicates that her ex-boyfriend, Jeff Simon, might be the killer, but he had a strong alibi. Catherine tries to tell to Grissom about her possible involvement in the case, but he does not give much attention to her. But when a second victim is found with the same M.O., they realize that the killer might be the same.

When the university students Paula Levine and Trip Wilmont are found dead on the floor after having sex in Trip's dormitory room, Grissom, Sara, Greg and Capt. Brass investigate the case. Grissom leaves the case since he has to go to the court and Sara and Greg use the monoxide carbon detector to look for a source, but they do not find any monoxide carbon in the room. Meanwhile, Brass talks to his next-door neighbor Zack Capola, who says that Trip and him were just mates, not friend. Sara and Greg proceed the investigation. Meanwhile, Catherine, Warrick and Nick join to David Phillip in the middle of a crop circle to investigate the death of a man. In the autopsy, they learn that the victim has urinated in his underwear. When the CSI team locates the owner of the helicopter that was in that area, they learn what has happened to Kevin Staniland. Meanwhile, Det. Louis Vartann finds that no investigator is available and Conrad Ecklie is forced to go with him to the Tangiers since there is a dead body needing to be processed. They learn that the victim is James Billmeyer from New Jersey and Ecklie requests the shoes of the woman that found the body since she stepped on the blood. When James' body vanishes from the morgue there is a further investigation.

While investigating a case, Nick is abducted and is buried alive in a special coffin while his team takes unorthodox steps to try to find him.

With its desperate attempt to ransom Nick's release failed by their enemy's fanatical revenge, the CSI team must use all their investigative talents to find Nick, whose perilous situation is becoming all the more horrific by the minute.

CSI team goes back to investigate crime scenes as a team, re-united together after the traumatic experience in season five finale. Nick's kidnap case audio tape arrives at the laboratory.

An up and coming movie star is found dead in his hotel room after partying with groupies. In another case, a dead cab driver leads the team to a string of deaths involving immigrant workers.

When a woman dies on her staircase, the team uncovers marital infidelity and an even bigger secret during their investigation.

A UFO cult commits mass suicide in an underground complex shortly after apparently dumping a body in a garden. When the CSI team discover their bodies, they suspect two members are still alive and go looking for them.

Nick arrives at the house of Jude McBride and the sheriff explains to him that they received an anonymous call reporting a possible crime. There is blood everywhere inside the house including three large pools. Nick learns that the Jude, Nina, Jeremy and Cassie McBride are a happy family and they are missing. Sara arrives in the house and tells to Nick that Grissom is at a conference. Then Warrick and Greg also arrive to help the investigation. Soon Sara finds a marijuana farm in the basement of the house. They also find that the anonymous phone call had called several times the family phone and they locate the caller, the local Dr. Malcolm Parker. When the laboratory discovers the identity of one fingerprint, the case begins to be resolved.

Catherine investigates the murder of a young mother who claimed God got her pregnant, while Grissom witnesses a very shady trial.

After a massive shootout between the LVPD and a Latin American mob gang, the CSI team have to find and process hundreds of bullets to determine exactly what happened.

The CSIs continue to process the evidence collected from the high-speed chase. They must also find the bullet which killed a police officer to determine who shot him.

A man is found in a dumpster with a very full stomach. A divorcing couple are found dead together on the floor of their house, where their dog becomes the first suspect.

The CSI team is called to help when Karen Mathews reports her son, Jesse, missing from a playground where he was playing on the swings. Witnesses report seeing a man with a blue baseball cap near the swings. Clues in the park bathroom include blood and the boy's underpants. The boy is eventually found in a store, accompanied by a woman with a man fitting the earlier description. But the couple with the boy claim that he is their son Adam, while Karen insists he is her missing son Jesse.

The CSI's investigate the death of a very hairy man. At a quick glance, the body can be easily mistaken for a werewolf. The man died from a gun shot wound. He, along with his sister, has a rare genetic disorder which causes excessive hair growth.

The murder of a man in a garage leads the CSI team to the daughter of the man who abducted and buried Nick alive earlier.

Someone tries to kill a diva called Lois O'Neill, who was related to the mafia years ago, and a waiter is killed instead. The CSI investigates the case, but more than ever, nothing is what it seems.

A man walks into a shabby apartment and shoots the occupant. On his way home, a teenager's car crashes into his car. Ally Sullivan insists on calling the police but the man refuses. As he leaves, he sees her texting her phone. Thinking that she's calling the police, he kills her. The CSIs have a hard time finding this killer as he knows how to cover his tracks really well. He is truly a professional.

A half-naked woman is found half buried in the desert with a branding on her arm. She has no hair and is missing her right hand. The woman turns out to be Lady Heather's estranged daughter. The autopsy reveals that the woman was a victim of an experiment and starved to death. The team investigates the Betz Clinic where the deceased underwent a sleep therapy session for her insomnia.

Excessive smoke coming from a fire place alerts the fire department, which in turns calls the CSIs as a charred body is found inside the chimney. The body is burnt beyond recognition. A gym membership card found on the body identifies him as the son of the house's owner. The opportunity to search the house leads Catherine and Warrick to look for any evidence about a one-year-old disappearance of a young girl who was on her way to this house before she vanished without a trace.

A woman is coming home staggering when her neighbor Christina Hollis stumbles into her crying, bleeding and nervous, since she has been raped. Grissom and Catherine investigate the case and are followed by a camera and a television crew of a reality show since the sheriff has authorized them believing that it would be good for the image of the department. They collect evidences from the apartment. Sofia interviews Christina in the hospital but she has no recollections of her assault. Their first suspect is the maintenance guy but his duct tape is different from the one used in Christina. Archie examines the elevator camera and sees a young man with flowers getting off at her floor. Later he is identified as Dwight Reynolds, who used to date Christina. Soon they believe the person of interest is a fireman. When the team crosses Christina's case with other recent cases, they succeed to find the suspect.

In a courtroom, Det. Sofia, Dr. Robbins and Nick go to the stand to testify about the murder of the popular high-school student Stacy Vollmer, who was found wrapped in a shower curtain and buried in a flower bed in her school. The prime suspect is Marlon West, and all the evidences point to him. When his twelve-year-old sister Hanna goes to the stand and confesses the crime, the judge gives seventy-two hours to the prosecution to check the evidences to proceed the trial without reasonable doubt. Who killed Stacy Vollmer?

A psychic is murdered in her own shop after predicting her own death.

The death of three unidentified teenagers lead the CSIs inside the world of rap music.

A criminal defense lawyer is murdered at her son's wedding and tied to the back of a car with beer cans. It is later revealed that she had a bad attitude at the bride, the groom's father, and basically everyone else.

When a man is found dead in an alley wearing expensive clothes, Grissom and Catherine meet Capt. Brass at the scene. They collect evidences and find a room key from the Palermo hotel in his pocket. Soon they learn his name, Jeff Powell, and he was driving a Ferrari with a sexy blonde. They identify the blonde as Heidi Wolf, who had one-night stand with Jeff. She says that he felt in love with her, but she did not want a long relationship. Capt. Brass and Grissom interview Jeff's boss, Los Angeles' producer Mick Sheridan, who tells them that Jeff was his assistant and saved millions of dollars in his divorce. So he was rewarded with a dream trip to Las Vegas. When Det. Sofia and Nick located the rented Ferrari, they find small damages and soon they discover that a black Corvette was the responsible. They interview the driver, Randy Bolen, who admits that lost a large amount to Jeff in a single game. When they learn that the Caprice Unlimited rented the Ferrari and the Corvette, they find that the company realizes clients' fantasies and they start to solve the case.

Mrs. Cutler is found dead, shot through the mouth, in her own home, which shows no signs of forced entry or disturbances. Her husband, Mr. William Cutler, is missing, only to be found later, alive, at his office where all of his co-workers were shot dead. He left the bloody scene with only a minor injury. All of this quickly becomes a hostage situation when Mr. Cutler, after shooting a security at a casino, holds a woman hostage.

While Jim Brass is in surgery the team has two cases to tackle. The first involves a man, found decapitated on train tracks, with a 19-inch waist. Further investigation reveals that he wore a wasp corset, as was fashionable with gentlemen during the Civil War. The other crime scene is in a hotel room where a man is found in his boxers, dead, on the bed. Scattered around the room are evidence of a wild night of alcohol, drugs, and sex. Ellie, Brass's estranged daughter, comes to visit her father from LA.

Foul play is suspected when an apparent suicide victim still has the gun in his hand, and a flower delivery woman is found crushed to death in the middle of a Cirque du Soleil performance.

Gil investigates the murder of a rock star, which is complicated by the discovery of a miniature replica of the crime scene at the house. And Catherine tries to determine if she was raped after waking up nude in a seedy hotel.

A group of dead bodies in the Las Vegas morgue get to know each other while CSI tries to solve the crimes that got them there.

A gang of street thugs is beating and killing people all over the city. Greg witnesses one of the crimes taking place and becomes a beating victim himself.

A lounge singer is found crucified inside a Catholic church, and the church's new pastor fails to disclose that he knows the victim from all the way back to high school.

A pedophile arsonist maintains his innocence in the disappearance of two young boys, but he is also willing to help the investigation by giving Grissom insight on the potential kidnapper's mindset.

Greg has his day in court for running over and killing a street gang member right before his own beating, and a second crime scene replica is found--this time after the murder of an elderly woman.

CSI investigates the deaths of estranged identical twins: one from a gunshot wound, and one from an apparent suicide. The two deaths do not appear to be related, but are they?

The team searches for a link between a current string of murders in Las Vegas and a notorious mob boss who disappeared in the 1970s.

Gil finds a third miniature crime-scene replica at a murder site, and CSI tries to find a link between the three otherwise-unrelated murders.

Catherine tries to link an accused killer to a second similar crime in a small town after he is found not guilty in the first trial, and Gil announces that he is going on sabbatical.

The C.S.I. team doesn't know what to make of their new member (Schreiber), who joins them in the hunt for a serial killer, active since the 1970's.

Keppler proposes that Catherine create a phony crime scene to help catch a murderer, and to keep it secret from the other investigators. However, Nick quickly figures out that something is fishy.

The discovery of a badly burned corpse uncovers a plot to illegally harvest bones and tissues, and the death of a middle-aged wife appears to be connected to her relationship with a high-priced male companion.

When one Trenton cop is murdered in Las Vegas, a second threatens to expose Keppler's past if he doesn't make the case and the evidence go away.

Grissom thinks the miniature killer is dead, until he receives another miniature crime scene. However, unlike the others, this one predicts a crime scene that hasn't happened yet.

A star high school basketball player disappears, and the investigation reveals that he gave an STD to a couple of his classmates.

Six showgirls who live together are murdered in their home, and Sara is distressed when the final victim dies in her arms. However, she may have left Sara a vital clue that could help her ultimately identify the killer.

A death in a drive-by limo shooting and the dragging death of a young woman turn out to be related crimes, and Greg discovers that the brother of the young man he ran over may have been involved.

With Grissom out of his office and all of the detectives out in the field, Hodges and the lab other techs try to discover new clues in the miniature killer case.

A washed-up boxer is found dead at a nearby bordello. There are several suspects, motives, and signs of injury. But the medical examiner is having a hard time figuring out which blow was the actual cause of death.

CSI discovers that a woman may have been murdered, and her head mounted on a wall as a trophy, because the killer was convinced that she was actually a powerful alien reptile.

After an unsuccessful attempt on Lady Heather's life, Sara discovers Gil's prior relationship with her. Meanwhile, Nick investigates the death of a woman apparently hit by a taxicab.

The miniature killer is ready to strike again, and Sara will be the next victim. Will CSI stop her in time?

The CSIs race against the clock to find an injured Sara, who has been kidnapped and put under a car in a remote area of the desert by the Miniature Killer.

While CSI tackles cases involving a teen beheaded in a go-cart accident and the murder of an iconic gentleman's magazine publisher, Ecklie confronts Gil and Sara about their concealed affair.

The parents of a missing girl are found murdered in a seedy motel room, and a registered sex offender now working as a church pastor is suspected. Meanwhile, Sara tackles a case involving a dead homeless man.

The hanging death of a possible hermaphroditic male is connected to a tainted water supply, while the day crew investigates 40-year-old skeletal remains found at the site of a recently-imploded casino.

The investigation into the death of a popular slasher movie actress is complicated by a series of frame-ups, double crosses, and blackmail attempts.

A young boy and his babysitter are murdered. The case is similar to an open child abduction case, so FBI agent Jack Malone comes in to investigate. Part one of a crossover with "Without a Trace."

The murder of a co-ed leads to the investigation of a brother and sister who were involved in another murder case from Sara's past, and the case drives Sara over the edge.

Hodges puts the lab techs through a series of "murder games"--a set of bizarre, hypothetical murder scenarios which all take place in the lab.

Two dead bodies lead CSI to an old-school mobster who runs a strip club. Meanwhile, divorce proceedings and prescription drug addictions cause Warrick's life to begin spinning out of control.

A well-known Las Vegas humanitarian is killed for her involvement in a dog-fighting ring, and CSI searches for clues in the strip club murder that Warrick was framed for.

CSI investigates three related deaths that take place during the Las Vegas bull riding championships.

The discovery of the body of a witness shot in a burned-out car could compromise the DA's case against the leader of a Latino gang. But was the gang really involved in the witness' murder?

CSI investigates the death of a toddler who was left in a cardboard box in a parking lot. A registered sex offender who is wrongly accused threatens Catherine after the real cause of death is identified.

A nightclub owner serving time in prison gets a temporary leave so that he can help Brass and Stokes investigate a double homicide with several connections to him.

While investigating a series of unusual deaths, the team discovers that all of the victims are tied together through a strange set of circumstances.

A temperamental sitcom actress is found dead in her Las Vegas hotel room, and there are plenty of suspects. Soon afterward, her photo double is also killed, this time in Hollywood in the dead actress' car.

A mobster that Warrick had a run-in with is found dead, and Warrick is found at the scene with the murder weapon. However, he insists that he has no recollection of the crime.

CSIs past and present come together at the news of Warrick's death. But will Warrick's real killer successfully frame another police officer for his murder?

A woman's unlikely suicide is tied to a bank robbery and a hypnotist, the team investigates the murder of a guidance counselor who was also a degenerate gambler, and Sara helps out in an euthanasia case.

CSI is caught in a race against time to catch a failed artist-turned serial killer who is leaving his victims in unusual poses all over Las Vegas.

CSI discovers two dead bodies in the same dumpster. One committed an armed robbery in a stolen police uniform, and the other is the teenage daughter of a South American drug lord.

When CSI investigates a homicide that appears to have connections to the S&M world, Gil turns to Lady Heather for help. But is he really there because of his personal problems with Sara and not for the actual case?

CSI needs the help of an 8-year-old, HIV-positive boy to figure out who shot and killed his uncle and his mother during a street party in Koreatown.

A man blames the anonymous sender of emailed death threats after his wife and daughter are shot. Two teens in a convertible crash into a tree; one has an inexplicable shoulder injury. Grissom attends a transfer hearing.

When a finalist for a popular television amateur singing competition is killed, it sheds new light on a 50-year-old murder at what was the first integrated casino on the Las Vegas Strip.

When a new murder leads to a connection with an infamous serial killer, Grissom secretly joins the class of well-known criminal pathologist Dr. Raymond Langston to gain access to the killer and get a crack in the case.

Grissom gets Dr. Langston's help to find the man who is carrying on the serial killer's work before the next victim is killed. The case will prove to be Grissom's last with the crime lab.

Dr. Langston has a challenging first day learning the ropes both in the field and in the crime lab, and the team has a difficult time deciding who will get Grissom's old office.

The lab tries to unravel a complicated case involving fake FBI agents, an ultimate fighter, and a possible human trafficking ring.

The unit takes on cases involving two employees killed after hours in a chicken restaurant, and a struggling mortgage broker's wife who was killed from swallowing a lethal amount of toothpaste

A respected congressman faces trial for murder, but a suicide and confession during the trial cast new doubt on his guilt.

CSI gets three new dead bodies, and all three cases have a connection to the same con artist with multiple identities.

Nick volunteers on his birthday to take a case involving a 16-year-old girl found dead in the parking lot of a seedy hotel, because he got to know the girl while investigating other cases at the hotel over the last year.

While investigating a gang-related shooting in an otherwise quiet suburban neighborhood, Raymond and Riley are held hostage.

One of Langston's former grad assistants is murdered. He discovers that she was investigating Mexican wrestlers to solve a series of unsolved murders.

Nick and Riley investigate the case of a badly injured skydiver, while Dr. Langston investigates the death of a religious leader out in the desert.

Will a case involving a television producer killed during a sci-fi convention kindle an unlikely romance between Hodges and Wendy?

A case from Catherine's past is reopened when a man who has been in prison for 18 years challenges the evidence that convicted him.

Dr. Robbins determines that a number of unsolved deaths are actually from rabies, and that they are connected to a tattoo parlor and a former medical examiner from Reno who runs it.

A biker who is brutally stabbed to death in a biker bar turns out to be an undercover agent whose cover was blown.

Langston investigates a homicide which is connected to the discovery of rare valuable chips from a legendary casino from the 1980s.

A young Hollywood actress is killed in what appears to be a simple drunk driving collision, but the team soon suspects that there is more to the case than meets the eye, and a shootout in the crime lab may confirm their suspicions.

Two murders occur in a neighborhood being taken over by undesirable residents, and the prime suspect has a connection to a serial killer case from CSI's past.

A mild-mannered operations support employee kills one of his co-workers. But while CSI is busy trying to figure out the killer's identity, the motive for his crime is revealed.

When a police officer shoots and kills his ex-partner in a parking lot, the team must figure out whether it was premeditated and possibly racially motivated.

WLVU's head football coach is murdered, and the case is connected to a wealthy booster, a dead prostitute, and the team's star running back.

CSI tackles a case involving a young man who was brutally raped and beaten, and a case involving the shooting death of an electronics store owner. But they soon discover that the two cases are directly related.

The homicide of a weathercaster who was moonlighting as a prostitute uncovers a clue that could lead Dr. Langston to the missing woman from his New York and Miami cases.

CSI tries to figure out who put a severed head in the ball return during a championship bowling match, while Dr. Langston reinvestigates the case of a wife accused of shooting her husband after the wife kills herself in her prison cell.

Henry's surprise birthday party turns into disaster when the guys discover a dead body in a shut-down, out-of-the-way barbecue joint. Back in the lab, Dr. Langston discovers that "Dr. Jeckyl" has struck again.

The CSIs dig to find the truth about how a recent shootout at a gun store might connect to a young woman who may have committed suicide.

After finding a new dead body, Langston and Brass uncover a connection to an unlicensed doctor who may be "Dr. Jekyll." Meanwhile, Willows discovers that two women found dead in a hotel were con women who preyed on an unsuspecting actuary.

A former pro golfer is found dead on a golf course during a tournament, one day after his estranged son sets the course record for the course low score.

The case of two high school students, one dead and one missing, lead the CSIs into the underbelly of streetcar racing and a tangled web of deadly competition.

Catherine and Nick try to find out how a member of the band Rascal Flatts was nearly electrocuted during a concert, while Ray runs into roadblocks while investigating the death of a retired CIA chief.

The team tries to figure out how and why a 14-year-old boy broke into the evidence facility and tampered with the evidence in an old murder trial, which led to his accidental death.

While Catherine helps perform surveillance on a pair of meth dealers in a casino hotel room, Archie accidentally stumbles on the dead body of a casino hospitality employee in the loading docks.

The team discovers that a man who shot and killed a married couple is actually a victim of "Dr. Jekyll," and Dr. Langston could be the doctor's next target.

Hodges and Wendy pose as CSIs to impress a group of "Crime Cadets" and get some help in solving a crime, and Hodges becomes jealous when Henry asks Wendy out. Meanwhile, Nick and Greg solve a bacteria outbreak at the police station.

While investigating the death of a high school white supremacist, the team unexpectedly stumbles on a fugitive Rwandan war criminal.

A comic who was one-half of a legendary Vegas duo from the 1970s is found dead on the eve of their reunion show, while the body of a fugitive who bombed an abortion clinic is dumped in Las Vegas with over 100 bullet holes in him.

An unsolved case from Captain Brass's past reemerges when the mother searching for her missing family is hit by a car, but neither may be prepared for the disturbing answers that emerge in the case.

A dead reporter is found with pictures of the victims of "Dr. Jeckyll" on her, and the investigation into her death reveal some disturbing secrets about Dr. Langston, past and present.

The crime lab reluctantly brings in imprisoned serial killer Nate Haskell after he claims to know the identity of "Dr. Jeckyll." Meanwhile, clues revealing his next and perhaps final victim are mailed to Dr. Langston.

The CSI team investigates a well-orchestrated bombing at the funeral of Officer Franklin Clark.

A shark attacks a woman in the pool at a casino day-club, and Catherine soon suspects it's part of a feud between rival casino owners. Meanwhile, Wendy has some sad news for Hodges.

A "vampire" is found decapitated in a park, and the team soon uncovers a possible alliance between his fellow vampires and a gang of "werewolves."

A well-known Las Vegas philanthropist is brutally slashed in her bed, and the team soon discovers that it is dealing with a killer who knows the secrets of some of the city's most prominent citizens.

Nick accidentally stumbles upon a badly decomposing dead body in the home of a mother with a severe hoarding disorder, but that is only the first of a number of grisly surprises the team finds in the house.

A college student suffers a death at the hands of an animatronic dinosaur from a Las Vegas show, while the death of a man whose daughter and friend disappeared years ago is tied a new lead on the locations of their dead bodies.

A badly shredded body is found in the back of an 18-wheeler, and the shredded remains of a credit card at the scene suggest that the CEO of a shady identity theft company is involved.

The deaths of a rancher and an engineer are tied together by their connections to a tainted water supply and the small-town newspaper reporter trying to expose it.

The death of a casino hotel guest is tied to an unlikely sexual encounter with a married woman in the room next to his, and a cat and a parrot may hold the clues of their owners' apparent double homicide.

The CSIs set out to track down a pedophile suspected of murdering an FBI agent's wife and kidnapping his children.

A prostitute is found dead at the same site where a staged photo of the same dead person was taken and posted on a website days earlier, and Hodges theorizes that the parts on his new motorbike were in a fatal accident.

While the team searches for a killer who is killing his victims with an electric chair, Greg falls for a classic film noir "femme fatale" who may be connected to the case.

The death of a prominent professor in the deaf community is connected to a feud between two deaf graduate students competing over a grant, and the investigation creates tension between Sara and Grissom's mother.

CSI investigates the discovery of a dead body with cremated remains in his mouth, and whose body parts were cut up and placed in thrift store boxes. Meanwhile, Langston's ex-wife comes to him with a surprise announcement.

Dr. Langston confronts Nate Haskell one more time during his murder trial. Meanwhile, Nick faces an old teenage nemesis, Jason McCann, who is seeking revenge for his brother's death.

When two people who were thought to be dead come back to life, the evidence leads CSI back to a discredited ex-professor who conducted bizarre death-related experiments in the 1970s.

After a cop convicted of killing his police officer wife is killed in prison, the team discovers that he may have been framed, and Brass and Vartann may have been romantically linked to his wife.

With a suicide, a homicide, and an accidental death already in the books, the team places bets on whether there will also be a natural causes death to complete "the cycle" before the end of the shift.