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 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.

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.

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

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.

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

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.

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.

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.

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.

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.

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.

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.

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.

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?

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.

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.

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.

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.

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.

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 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.

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.

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.

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.

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.

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.

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.

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

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.

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.

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.

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.

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 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.

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.

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.

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

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.

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.

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 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.

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

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

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.

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

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.

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

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.