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..

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 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.

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.

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.

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.

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.

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.

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 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 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 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 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.

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.

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.

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.

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.

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.

Dr. Langston turns to Lady Heather for help in the murder of a woman who acted like a cat, and Nick tries to figure out what caused a pregnant teen to commit suicide after he saves her baby.

While the team discovers body parts of a man and a woman in a barn, a ransom video involving one of Nate Haskell's brides arrives at the crime lab. They soon discover that the two cases are actually connected.

Dr. Langston sets out on a vigilante mission after Nate Haskell goes to Los Angeles and kidnaps his ex-wife and kills her husband.

Dr. Langston kills Nate Haskell, but was it murder or self-defense. Meanwhile, a closer look at the crime scene reveals details about Haskell's twisted past and his descent into a serial killer.

Under the direction of new boss D.B. Russell, the team tackles cases involving a wild shootout on a tram car, and a body dumped in an alleyway.

The task of solving the grisly quadruple homicide of an entire family becomes more complicated when three people confess to the crime.

A sadistic killer from Sara's past who recently got out of prison appears to have struck again, while another dead body appears to have drowned in chocolate.

The former Las Vegas mayor is shot during the grand opening of a new mob museum, and a maid is killed in the hotel room of a chauvinistic Middle Eastern prince.

Morgan's life may be in danger when an injured man, who is also a suspect in the murder of two gang members, hijacks his medivac helicopter and demands to be flown to Mexico.

The murder of a popular sideshow performer sends the team behind the scenes at a carnival freak show. Rachel is found sadistically slain, the team goes behind the scenes of the carnival freak show to find her killer.

The CSI crew is stumped when they discover a disembodied brain at a crime scene where all the other brains are accounted for.

When the CSI team investigates three seemingly unrelated murders, they discover someone is getting revenge for cold case murders that were never solved.

As CSI and the FBI work together to solve the murder of a gunrunner working for a private defense firm, they discover that hundreds of very dangerous black market weapons may be out on the street.

When a genealogist is found dead in Dr. Robbins' bed, the team works on the theory that his wife may have been cheating even though she maintains her innocence.

The skeletal remains of three people are found in the desert. Initially beetle evidence implies they had been dead at least a week but other factors contradict that. They bodies were identified as a lawyer, that Catherine had a connection with, and his two employees. Catherine had recommended the lawyer to a friend, who was trying to escape her dangerous husband. After analysis the beetles appear to be genetically altered. Catherine fears her friend could be dead until she makes contact with a location.

Catherine goes into hiding with D.B. after Mark Gabriel's hitmen try to kill her, but they soon come to the realization that Gabriel himself may not be calling the shots.

When a "hair stalker" escalates to murder, CSI turns to his "muse" to identify a suspect before he claims his next victim.

D.B. turns to a "blood whisperer" from his past to help solve a crime involving a gunshot victim who has lost his short-term memory.

Three dysfunctional siblings fight over ownership of their stolen house, which contains a lot of secrets--and dead bodies.

The team works against the clock to find a kidnapped boy, which becomes even more difficult when a blackout shuts down the entire city.

The team discovers that a WLVU student notorious for his gossip video blog was killed because he was about to expose a major campus scandal.

While the team tries to figure out a team of wedding bandits' next target before they strike again, Morgan pretends to be David's girlfriend to impress his mother.

The task of figuring out who shot and killed a pediatrician in a casino becomes more difficult when the team discovers that the killer is one of three identical triplets.

A killer is about to go free because of a dirty cop, so the team tries to connect him to an earlier crime to keep him in jail.

A vehicle explodes during an off-road race, and the team discovers that it may have been connected to a plot to kill an oil executive.

While at a campaign dinner for the Sheriff, the team are called to a triple homicide with a familiar victim.

While Ecklie fights for his life after the shooting, the team close ranks in preparation for McKeen's next move.

CSI investigates a massacre at a local diner, and the team suspects that one of the victims' stalkers is the shooter.

A homicide at a rave leads CSI to a gruesome discovery involving two badly abused sisters.

A female acquaintance of Greg is killed, and it appears to be related to an old Vegas legend about a mobster who murdered a musician back in the 1960s.

Nick searches for a cop killer with the help of the victim's canine partner, and the team tries to figure out who shot and killed a divorce lawyer.

The coach of WLVU's basketball team is murdered, and the case turns out to have multiple connections to DB's son Charlie.

A reverend is found dead on former CSI detective Warrick Brown's grave, and the team discovers several connections between the case and Brown and his family.

A mass burial site in the desert has an unlikely connection to an accused serial killer in Seattle from detective Finlay's past - but how far will she go to bring him to justice?

While working a foot patrol on the strip, the CSIs stumble on a murder victim, and a number of their suspects are already in police custody on lesser charges.

A plane crashes in a park off the strip, and the team discovers that the plane was sabotaged while it was still on the ground.

The team must figure out who killed a television news anchor on the set during a blackout.

CSI handles a case involving a rising tennis star who is killed after a big tour victory.

While the team tries to solve a murder tied to counterfeit wine, Mac Taylor from the New York crime lab comes to Las Vegas for his girlfriend's convention, only to discover that she has disappeared.

While investigating the death of a Cuban singer's sister, CSI discovers that the case may be tied to a feud between two Cuban families.

The evidence suggests that Sara is guilty of stabbing a man to death in a hotel room, but she insists that somebody is framing her.

The team investigate a "locked room mystery" when a poker player is found murdered in an elevator, which he rode alone. Meanwhile, the search is on for a dominatrix who took a session too far.

Assistant medical examiner David Phillips discovers the dead body of the most popular girl in his class at their 15-year class reunion.

While investigating the brutal homicide of a teenage motocross driver, the team stumbles upon a man and his daughter living in mysterious underground bunker.

The murder of a brother and sister and a pair of home invaders is part of a complex revenge plot, and a man is burned alive in the trunk of his own car.

A pharmaceutical employee is found dead in a mud bath during a corporate retreat, and Hodges discovers an uncomfortable secret about his fiancée.

A ghost hunter is killed while investigating a notoriously grisly murder site of several young boys.

CSI searches for a serial killer inspired by Dante's "Inferno," and Brass's daughter may be one of the killer's next victims.

The search for the serial killer who kidnapped Brass's daughter intensifies after Morgan become the killer's latest kidnapping victim.

The team uncovers a complex plot to rob a high-stakes Texas Hold-em game, but one of the co-conspirators may have been forced to participate against his will after his son was kidnapped.

The team has to put together the pieces when four dead bodies are found after a fire in a music club during a hate core concert.

The remains of a contestant eliminated from a cooking reality show are used as ingredients in the dishes served during the program.

The team gets a second crack at a reclusive millionaire who may have gotten away with murder 14 year earlier when a new dead body is found in his home.

A homeless man is found dead in an alley after suspiciously winning big at a casino, and CSI soon finds connections between the victim, two casino employees, and a local pawn shop.

Sara suspects CSI is dealing with Armenian terrorists when she discovers a bomb on a man found in a flood channel, and Greg is accused of planting evidence in an old case.

CSI investigates a homicide involving a victim found in a human-sized hamster ball, and Brody gets some help as she tries to find a serial rapist.

The team deals with a third grisly homicide case that happens in same seedy hotel room in a couple of months.

A spa weekend for Sara, Finlay and Morgan turns into a murder investigation and missing persons case when Finlay disappears, as the CSI team must piece together what happened in detail to find her.

When a man is found murdered at an elaborate holiday party complete with real snow and live reindeer, the CSI team is brought in to investigate.

After a number of passengers discover that their carry-on items have robbed during a flight, one of the primary suspects is murdered shortly after leaving the airport.

An investigative journalist appears to have been killed in a car accident, but CSI soon discovers that he is still alive and trying to uncover the truth behind a top-secret military project.

Dr. Robbins goes to Mexico to do an autopsy on a friend's daughter. Meanwhile, back in Vegas, CSI finds a man and woman shot to death and buried in concrete.

A 16 year old girl is raped and killed, and the investigation leads CSI to a brothel and some disturbing family secrets.

CSI searches for a killer whose victims and locations resemble moves on a chess board, and Greg is forced to turn to an old mentor to search for clues about the next victims.

A groupie is found dead in a limo after a show, and CSI ties the murder to a "fame experience" featuring three amateur rockers playing with KISS star Gene Simmons.

The CSIs are called to investigate when an entire family is reported to have been missing for a month.

A teenage boy shoots up LVPD headquarters and then holds Russell and one of his shooting victims hostage.

A cannibal is on the loose in Las Vegas, and Ecklie begins to contemplate his future as sheriff.

The CSIs investigate the cyber-related murder of a prominent casino owner's wife and receive help from the FBI's Cyber Crime Division. Patricia Arquette guest stars.

The discovery of a dead body rekindles a 25-year-old mystery involving a robbery and a dead boy, and an amateur forensic investigator helps crack the case. Meanwhile, Brass's daughter is in the hospital after an overdose.

Russell and Finlay must confront a serial killer case from their past while working in Seattle when a copycat killer suddenly emerges in Las Vegas.

The family of a medical marijuana dispenser is held hostage, but the job of finding the kidnappers becomes harder after the best potential witness is killed by the dispensery's security guard.

CDC may be dealing with a potential deadly virus outbreak in Las Vegas, and Sara and Greg may have been exposed to the virus while investigating a crime scene.

While investigating the death of a high school chemistry teacher, CSI discovers that he belonged to a secret wiccan society.

Brody, Sidle and Finlay try to relax at a forensics conference when a mass shooting occurs on site.

Frustration mounts for the CSI team as another victim surfaces who is linked to the Gig Harbor killer.

A woman in rehab at a posh Las Vegas facility is killed, and everybody at the facility is under suspicion.

The CSI team delves into the kinky world of "rubber dolls" when they investigate the murder of a man stabbed in an alley.

The team discovers that a murdered prisoner who was informing from the inside to the police had a second job informing for the Feds.

An ex-con buried alive in the desert is killed after being hit by a car. The CSI investigation takes them into the world of pool, high-stakes hustling, and prostitution.

The team discovers that a mysterious homicide was caused by a man in a wingsuit, who is also found dead the next day.

Sara reopens a 10-year-old family murder/suicide case when the lone surviving daughter claims to have a new memory about that fateful evening that proves that the father didn't do it.

D.B. makes the risky decision to use his daughter as bait to catch the Gig Harbor Killer, and discovers the shocking identity of the killer's partner.

The investigation of a dead body found in a car that once belonged to a serial killer takes the detectives into the twisted business of "murderabilia."

The CSI team investigates the murder of a young victim dressed as a superhero.

A murder victim is covered from head to toe in silver chrome paint, and the clues lead the team to a classic convertible in which a Las Vegas legend was murdered.

The CSIs investigate a murder that's linked to the kidnapping of two teen girls.

A final showdown between the CSIs and the Gig Harbor Killer, whose motives are revealed. Meanwhile, Nick Stokes makes a decision that affects the team moving forward.