The CSI team says goodbye to Catherine Willows as she makes a life-changing decision.

Season finale: The investigation of a triple homicide leads to the discovery of corruption running rampant throughout the LVPD. The closer they get to the truth, the more serious are the repercussions. To be continued...

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

Nick takes the lead on a case where in the house a family of four, three pools of blood are found. Nick thinks that the little girl may still be alive, but Sara is doubtful, thinking that Nick's recent near-death experience is affecting his judgement.

When a teenager and her sister are the sole survivors of the gruesome murder of four members of one family in a quiet suburban neighborhood, Grissom and his entire team investigate the crime. What initially looks like a bizarre cult murder becomes more disturbing when they discover the motive behind the massacre.

The CSI team is shocked and saddened when, after working with Dr. Raymond Langston (Fishburne) on the "Dick & Jane" murders, Grissom announces that his time as a CSI has come to an end and offers Langston a permanent position on the CSI team.

After Warrick is shot in a Las Vegas alley, the CSI team comes together to deal with the aftermath.

The CSI team is called in to investigate the stabbing of a couple found at a local motel that is reminiscent of two incidents that occurred in the same room.

Russell seeks advice from a former colleague during an investigation into the death of a man's ex-girlfriend.

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.

D.B. Russell leads the CSI team on a hunt to find Morgan and Ellie Brass following their kidnapping by a ritualistic killer.

When the CSI team is called in to investigate a man who is shot at point-blank range in a local casino, they shut down the entire building to find their killer.

When a woman is found dead and her hair is done up '70s style complete with vintage clothes, the CSI team discovers clues that point to a killer with a hair fetish.

The team meets a blast from the past, with a chance to solve a cold case that has haunted the team for 14 years.

In the second part of this two-parter Grissom investigates the murder of an aging rockstar who is found dead in his kitchen with an exact replica of the crime scene on the counter next to him. Meanwhile, Catherine probes her own abduction and learns that someone may be targeting her family.

The CSI unit investigates when Frank, an apparent murder victim, sits up and needs help but is he just another victim?

The entire team investigate the abduction of the infant child of a well to do family. Suspicion immediately falls on the child's parents.

When a house is stolen completely off its foundation, the CSIs are on the case in search of answers. Meanwhile, new CSI Julie Finlay showcases her skill in blood analysis.

The CSI team investigates a mad slasher who strikes without leaving a trace -- because he wears a form-fitting black latex suit that leaves not a molecule of evidence behind

The CSIs are shocked when they discover that a victim in a car crash is someone they are familiar with.

When a man's dead body turns up naked in the bed of Doc Robbins' wife, the detectives try to "just work the scene" without bringing their pre-judgments to the table, but it sure looks like a case of Death During Adultery.

An inbound plane’s passengers become the victims of an onboard thief, but when one of the passengers is found dead, the petty crime turns into a murder investigation.

When a has-been boxer is killed, the CSIs must establish which of several life-threatening acts actually killed him.

Sara is a lead suspect in an investigation after a brief encounter with another man in which she was the last person to see him alive. Also, her separation from Grissom begins to take a toll.

When a woman is found dead in Mexico and a murdered couple is discovered in a driveway, evidence from one investigation could help the other.

Grissom and his crew are called in to investigate the death of a young woman found in the hotel room of popular actor Tom Haviland. Haviland admits that he slept with her, but denies killing her. Grissom believes otherwise, however, after finding blood evidence on the celebrity. Then things get personal when Haviland's lawyer hires Grissom's former mentor, Philip Gerard, to find mistakes in the forensic part of the case. And, unfortunately for Grissom, Gerard finds plenty of errors to exploit.

The murder of a retired Army Ranger brings the FBI in on the case, to Russell and Catherine's initial chagrin.

A casino employee is beaten and raped on her way home from work, but she survives and identifies her attacker. Unfortunately, a DNA test sets him free and Grissom must wrestle with whether evidence can ever lie. Later, Grissom comes to the rescue of a coworker who ends up on the other side of the law

As the CSI's continue their search for and discover the identity of the "Miniature Killer", Grissom and Sara's relationship gets exposed to the rest of the team as she goes missing during the investigation. The "Miniature Killer" is finally captured, but not before a member of CSI becomes the killer's final victim.

Three new murders related to three unsolved (or incorrectly solved) crimes from the past come back to haunt the CSIs.

The CSIs investigate the mysterious death of a ghost hunter and experiences déjà vu when the victim has eerie similarities to an old case.

A murdered Elvis impersonator has a strange connection with a bird.

When the CSIs investigate a triple homicide, Russell has to find a way to connect with a 6-year-old girl who was the sole survivor and witness.

When a K-9 is blamed for the death of his partner, the CSI team discovers there's more to the case. Meanwhile, Finlay and Morgan investigate the death of a high-profile divorce lawyer with a lot of enemies.

The CSIs investigate the demise of a prominent news anchor during a live broadcast.

When a student is arrested and tried for the murder of a popular high-school girl, the suspect's 12-year-old sister confesses to the crime. This results in the judge giving the prosecution 72 hours to re-examine the evidence before the jury delivers its verdict.

When Stokes learns that a man he helped put in prison is going to have his conviction overturned, the CSI team needs to prove the killer is guilty again or he will be released.

Catherine is ordered by a kidnapper to accompany a man who is to deliver $1 million in ransom to him or else he will kill the man's mistress.

Grissom's nemesis, serial killer Paul Millander, reappears and claims a third victim in this gripping episode. The latest slaying matches Millander's previous killings in that it recreates his father's murder. The killer's next target was born Aug. 17, 1956...which just happens to be Grissom's birthday.

The team investigates when a whole family is reported to have been missing for a month.

The team has few leads to go on when investigating a robbery-homicide at a themed wedding

After years of pursuit and a countless number of murders, Langston comes face-to-face with serial killer Nate Haskell inside the house where his killing spree began.

Langston becomes more determined than ever to track down Nate Haskell, the notorious "Dick & Jane" killer, after discovering that he's kidnapped his ex-wife, Gloria.

A string of deaths, including a gamer found dead on his couch and a newly divorced man at the bottom of a pool, instigate a bet among the CSIs as to whether they've "hit for the cycle" - a homicide, a suicide, an accidental and a natural death all in one night

The investigators attend the gala grand opening of a mob museum, only to witness an attempted hit on mob lawyer and former mayor Oscar Goodman.

D.B. Russell leads the CSI team on a hunt to find his kidnapped granddaughter.

The CSI team investigate a murder at the home of Marta, a "level 5 hoarder" whose home is stacked high with possessions and garbage--and more than one dead body

When contestants on a reality cooking show accidentally eat human flesh during a competition, the CSI team is brought in to investigate.

Catherine comforts Warrick when he is accused of murdering a famous Vegas gangster and even he is uncertain of his guilt or innocence.

When a famed music historian is murdered and left in a piano, it has an emotional effect on Sanders, who had a past with her.

Grissom and his team investigate the death of a first class passenger on a flight to Las Vegas. The investigators are forced not only to examine the physical evidence, but also to interview all of the first class passengers to get their personal accounts of the incident.

The CSIs arrive at their favorite diner only to discover a gruesome crime scene with eight dead victims and a lot of questions.

A bomb goes off in an office building killing one and injuring many more. The chief suspect is a security guard who left minutes before the explosion and has knowledge in bomb making. Nick helps his prostitute friend again. After giving in to his passion, she is found dead the next morning. Naturally, Nick is a suspect and to make it worse, Ecklie has the case.

During a date, Stokes discovers decomposing body parts in part of an art exhibit; D.B. Russell deals with a staff member confrontation.

When a blackout cripples the city, the CSIs must revert to old-school methods to solve the case of a missing child.

A body is discovered during torrential rain in Vegas; Sanders is accused of framing a man for murder seven years ago.

When a teen opens fire in a police station, Russell is taken hostage.

The team is investigating the ongoing murders by a signature killer. The killer has some knowledge of forensics and has left little evidence behind. With the investigation somewhat stalled, the sheriff invites the FBI to join the case. This makes Grissom angry and it only gets worse when Sara offers to bait the killer.

A man accused of murdering his wife and co-workers leads the CSIs on a wild ride through a busy casino, eventually barricading himself and a hostage in a casino hotel room. The CSIs process the evidence from the crime scene to determine whether or not the man acted alone or had an accomplice. One of the CSIs eventually steps in as a hostage negotiator, putting himself in danger.

When a bomb kills an off-road race truck driver mid-race, the CSI team is called on the scene to investigate why.

The CSIs sift through the overwhelming evidence from a shootout with drug dealers in order to determine who is responsible for the death of a police officer killed during the incident.

When a girl is shot and killed at a large rave in the desert, the CSI team has to search for clues, find her missing friend and bring the killer to justice.

Finlay must deal with a bomb planted in her car. Russell gets a call from someone claiming to be the Gig Harbor killer.

The team investigates the cyber-related murder of a prominent casino owner's wife and receive help from the FBI's Cyber Crime Division.

A woman is abducted from a supermarket. In the store, Grissom finds a bathroom stall door that claims five women have been killed. Warrick is caught in a casino on duty and is paired with a reluctant Sara. Their case is the apparent murder and robbery of a man who is found be his brother. Nick gets pulled in by his prostitute friend who gets in a scuffle with hotel security.

Royce Harmon was murdered 3 months ago in a scene staged to look like a suicide. Now another murder has taken place. Whoever the killer is he has a thorough knowledge of forensics, he purposefully has left evidence, and has baffled Grissom and his team. Warrick and Nick investigate the case of a man who went over a cliff in his car and is now unconscious.

The CSI team investigates the death of a homeless man who had a huge winning streak at a small casino.

Grissom and Catherine investigate the apparent violent death of a woman found in a sandbox. Warrick and Sara are called to a crime scene to investigate a shooting, which initially appears to have taken place during a robbery.

When a photo of a dead college student starts trending on the Internet, the team steps in to investigate.

The CSI team investigate a murder at a high stakes poker game.

When three people confess to killing a family, the team must decide who is telling the truth.

At his wife's urging, David reluctantly attends his high school reunion -- which becomes a crime scene when the bitchy former high school queen is found dead in a back room.

The CSI team lends a hand to local law enforcement on the strip with several arrests until a John Doe is found in car. Also, things become personal for Captain Brass when he discovers some facts about his daughter.

A rising young star is killed in a wreck and her determined stalker claims credit, but the team finds out there's more to this tragedy than meets the eye.

A wealthy defense attorney is killed at her son’s wedding but Nick’s car, containing all the collected evidence is stolen and the case is compromised. After discovering new evidence, the team suspects that someone from the wedding party may be responsible for the murder.

The CSI team investigates a murder at Clark County jail after an inmate stumbles upon a body while running away from officers.

The CSIs investigate the gruesome murder of Lady Heather's estranged daughter, Zoe, who was found in the middle of the Vegas desert.

At a swanky fundraiser, attended by the sheriff, a woman turns up dead in the pool. The owner of the house is away and a young couple is housesitting. Warrick looks into an apparent professional hit in the glass elevator of one of the hotels.

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

While investigating an elderly woman's murder, Grissom receives a miniature crime scene replica; Greg attends a hearing to ascertain his culpability in a teenager's accidental death.

A mother thought to be grieving for the loss of her family three years ago becomes a suspect in a CSI investigation.

The CSI team investigates a fire at a music venue that leaves four people dead, including two band members.

When eight bodies are found in what appears to be a meteor site in the middle of the desert, CSI Finlay recognizes one of the casualties, prompting her to revisit her past.

A couple leaving a restaurant on their anniversary are killed in the street and their car is stolen. The crime scene is compromised when it rains shortly after the CSIs arrive. It gets more mysterious when the car is found and it becomes a new crime scene. Catherine looks into the collapse of a city owned residence that kills three elderly women. She runs into problems with the city engineer responsible for the building.

Morgan, Sara and Fin try to relax at a forensics conference when a mass shooting occurs on site.

Grissom and Sara investigate when a man's body, which has been doused with lye, is found buried in a park; Nick tries to determine how a hiker apparently drowned in a desert.

Jason McCann contacts Nick and says that he's in imminent danger. Langston has a courtroom war of nerves against serial killer Nate Haskell. A bomb tech disarms a bomb attached to Nick's house. But when he accompanies Nick, Catherine and Vartann to a warehouse with multiple booby-traps per square inch, Kip has to really earn his paycheck to find a safe way out for the CSI team.

Grissom and his crew handle their highest profile case to date when the city's former chief of detectives is slain execution-style in his house following a wild party. Missing from the residence are the chief's trophy wife and their 7-year-old daughter. Catherine and Warrick follow the trail to Miami, and soon enlist the help of Horatio Caine.

The CSI team must investigate one of their own when Langston is accused by a former colleague of being part of the Dr. Jekyll murders, on part one of a two-part season finale of CSI.

The team must investigate the death of a police officer who died during a shootout leaving hundreds of bullets on the crime scene. The case becomes complicated when it turns out that Sofia Curtis and Jim Brass were with the victims during the shootout. When it turns out the officer died from friendly fire, it is up to the team to find out who fired the fatal shot. Meanwhile, Sofia is wondering whether she fired the fatal shot or not. She decides to hide the fact that the officer stepped into her line of fire, afraid it will ruin her career.

Grissom investigates when a woman vanishes while taking part in a magician's act. The female volunteer is placed inside the Amazing Zephyr's "Chamber of Doom" and the illusionist thrusts swords through the box. When it's opened, she's gone---and doesn't reappear in her seat as she's supposed to. Only traces of blood are left inside the chamber. Clues lead the CSIs to an eerie, decrepit mansion filled with secrets. Elsewhere, a rock star's death on a band bus appears to be the result of an overdose, but Catherine uncovers evidence that points to murder.

The CSIs investigate a crime that has ties to a 25-year-old mob heist; Brass is faced with a decision when his daughter tries to commit suicide.

In part one of this two-part seventh season opener Grissom and Catherine handle the case of a women's dead body found at Cirque du Soleil by a performer. Meanwhile, an investor at one of Sam Braun's new casinos is shot to death during a party on the rooftop. Catherine's life is in jeopardy after visiting a nightclub with Nick. Grissom finds a miniature replica of a crime scene that he is investigating.

The entire CSI team investigates a disappearance at a local university. A young woman vanished, seemingly off the face of the earth.

Things get personal for the CSIs in the top-rated series' third-season finale, which explores the intersection of the investigators' work and their personal lives. Three masked bandits steal a safe-deposit box from a Las Vegas bank in a daring daytime heist, during which Det. Lockwood is killed. Lockwood's death provides Grissom and his crew with added incentive to find the murderous culprits. But the case really hits home for Catherine when the evidence leads to casino owner Sam Braun, who is like a father to her. Also, Grissom's hearing gets progressively worse and he seeks out Dr. Robbins for help.

Grissom investigates a possible suicide at a high-profile construction site. Catherine takes on a case with a teenage boy who dies while in session with his female psychologist,

Distracted by an attractive passenger, an Indian taxi driver feels his cab strike something at a suburban intersection. When he gets out to check, he finds a teenage boy pinned beneath the left rear tire, apparently killed on impact. The cabbie jumps back into the taxi to call for help, but a mob of angry onlookers - all of them white - drags him out and beats him for the crime. When Grissom arrives on the scene, he discovers that the teen has been eviscerated and has stab wounds, but shows no signs of having been struck by the cab.

The CSI's lives are on the line as they close in on the elusive Dr. Jekyll, and more than one member of the team may not live to see his capture, on part two of a two-part 10th season finale of CSI.

Two murders that happen during Las Vegas' annual bull riding rodeo are investigated by the CSIs, who find that the murders might be connected to illegal bull breeding.

Grissom, Catherine, Nick, Greg and Brass are investigating the death of a well known TV star called Annabelle.

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

A woman who was pulled over by police is found murdered two miles up the road from the stop. It's not long before Robbins determines that the woman is, genetically speaking, not a woman.

The world of illegal dog fighting is explored by Grissom and the rest of the team when they take on the case of a wealthy socialite who was murdered. Meanwhile, Warrick struggles to clear his name in the recent exotic dancer murder case.

The team has a hard time investigating a shooting in Koreatown when none of the witnesses will talk about the crime.

Grissom is called to a murder of a 17-year-old in a casino penthouse. Sophia Curtis (Louise Lombard) joins him in his research, she normally works in the day-shift. The entire team gets involved when its discovered that a kiddnapping took place along with the murder.

Grissom and the team join forces with Jack Malone, an FBI Agent from New York to track a serial killer. The crossover continues on Without A Trace S06E06 Where & Why (II).

The CSIs become the focus of a reality TV series, which follows them while they investigate a serial rapist, who recently gained access to a woman's apartment by posing as a fireman. Also, Warrick's work on the late-shift is causing problems with his marriage to Tina.

The team investigates an underground mob. Warrick ends up becoming the prime suspect in a murder that's related to the mob, and his addiction to pills starts to have a significant impact on his job as a CSI.

A serial killer strikes again, and the CSI team tries new technology using evidence from a prior killing. They find a fingerprint belonging to Jesse Acheson, who becomes the prime suspect. A boy confesses to the killing of his brother, but evidence suggests that he may not have committed the crime.

The CSI team investigates a homicide at a convention for people who collect macabre murder memorabilia.

The CSI team investigates a death involving a vintage Rolls Royce and a chrome-covered victim.

Catherine and Detective Vartann are thrown together in a hotel room for 24 hours as they stake out a duo making drugs in the room next door. Meanwhile, Nick and Langston work a case that involves a fetish which has become big business in Vegas.

Grissom and Sara may be secret lovers, but they still find ways to surprise each other like when their religious beliefs surface when two nuns find a body of a woman crucified on a makeshift cross. The woman was found in a church where the priest may be a man of sin instead of a man of God.

Warrick, Catherine, and Nick try to determine the cause of a house fire that kills a teenage kill. The fire is in the same neighborhood as a similar arson fire. Grissom and Sara investigate a man found dead with letter tiles in his stomach. The man was a competitor in a word game tournament.

The CSI team investigates a murder with ties to two teenaged kidnapped girls.

Two amorous freshmen are found dead on a sleeping bag in a dorm room, and Sara and Greg run into one dead end after another as they try to determine why the students were killed. Warrick, Nick and Catherine figure out how a man is found dead in the center of a crop circle. Ecklie is called into duty for a man found dead in his car and his body later goes missing.

Grissom and Sara investigate the murder of a woman after a swap party. The married couples in the neighborhood meet and switch partners. With the help of a crime scene cleaner, Nick and Warrick find there was more to their crime scene than they first thought. Catherine wants a promotion to day shift supervisor.

The CSI are called to three different crime scenes in one night that are seemingly unrelated, but each case's forensic evidence reveals a common link

A legendary comic from the good old days of Las Vegas is set to reunite with his partner on stage for one night only, until one half of the famous duo is found dead.

The team is introduced to the ""Furry"" side of Vegas when a man is found dead on the side of the road, dressed in a racoon suit. Elsewhere in Vegas, a gunshot victim is found in a deep-freezer, frozen solid.

Grissom and his team battle the flu when they are called upon by D.D.A. Klein to investigate the deaths of several key witnesses for a grand jury case against a dangerous Las Vegas gang.

CSI investigates the death of a little girl whose identity remains unknown.

Grissom asks Lady Heather for help when the team investigates a case connected to the world of domination.

The team investigates the death of a woman who turns out to be the daughter of a wanted criminal.

When a band member of Rascal Flatts is electrocuted by his own guitar during a concert, the CSI team investigates if it was a case of foul play.

The CSIs question the validity of an online picture depicting a murdered call girl until they find the same woman strangled to death in the dumpster that appears in the photo.

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.

Nick and Keppler investigate the bizarre world of the black market sales of body parts after they find a body that has been burned and the organs removed. The rest of the CSI team investigates the death of rich woman who was killed in her own home.

The team investigates a girl whose whole family had been killed and she is supposedly possessed by the devil.

When a young boy is found murdered, the CSI team uncovers evidence that may link his death to an old case that recently resurfaced.

When a seasoned sky diver is paralyzed after free falling to earth when his parachute doesn't deploy, he turns out to be linked to the strange death-by-airborne-toxins of two wealthy men with ties to Iran.

When the producer of the reboot of a classic SF show is murdered at a Las Vegas science-fiction convention attended by both Hodges and Wendy (both, unknown to each other, fans of the original show), they find a connection with each other as the team investigates the crime.

When a major Las Vegas player is found dead, Ecklie orders both teams to investigate the case. The man who had secrets on everyone in Vegas had a very big one of his own.

The murder of a mother and her child seems to be connected to a murder case from 12 years earlier.

Grissom and his team investigate when an actress is killed on the set of a horror porn film.

While Langston testifies in the trial of a respected Congressman, new evidence sends the CSIs back to the lab to reopen the investigation.

Grissom investigates the mysterious hanging death of a young man whose body looks like that of a female.

The detectives search for the murderer of FBI agent Billy Ray Jackson, only Billy Ray isn't really an FBI agent, and neither are his impressively capable partners, Miles Baker and Emma Solomon.

When a policeman kills another officer, the CSIs must look to the evidence to determine if the shooting was premeditated or an accident.

The swing shift has a busy time. Warrick looks into the murder of man by someone who apparently needs a wheelchair. Nick looks into the murder of woman in the subculture of the narcocorrido, songs about drug murders. The night shift is slow and lends help to Catherine's team.

The CSIs investigate the demise of a famous Cuban singer’s sister who’s in town as part of a U.S. tour. Meanwhile, Hodges begins to get cold feet at the prospect of marrying his Italian bombshell girlfriend.

The CSIs come across an abandoned military compound being used by a small cult. The CSIs grow suspicious when they see that a mass suicide has taken place, but only 11 of the 12 beds are occupied.

The CSI team find themselves taking a look into the kinky world of “rubber dolls” as they investigate the murder of a man stabbed in an alley.

The CSI investigates the mystifying death of a former pro golfer whose allegiance to the game might have cost him everything.

Grissom and his team investigate the starving death of a five year old boy. They discover the boy has siblings who are in danger too. Catherine and her team determine who killed a prisoner in a holding cell brawl.

A child is abducted. As the Amber Alert goes out, the entire team investigates in a race against time. Lindsay Willows is found hitchiking to the alarm of Catherine.

A popular young singer is found dead outside an infamous Las Vegas nightclub, leading the CSI team to uncover a link between that crime and a murder 50 years earlier.

One night, four cases. Grissom and Brass get a stolen hummer and a taco stand. Warrick gets a dead car show girl. Sara and Greg get a dead bodybuilder. Nick gets a dead boy found on a bench.

A wild night in Las Vegas has the CSIs simultaneously investigating four fatalities. Greg Sanders' first day in the field has him assisting Grissom's investigation of a fatal nightclub shooting. Meanwhile, Catherine probes into the death of a stripper found dead in a hotel room, while Sara and Nick look into the strange case of an "alien" body found near Area 51.

A murder aboard a luxurious 747 and the discovery of two formally attired teens in the desert confound Grissom and his crew in this absorbing episode. First, a horse trainer is found dead in the cargo bay of a private jet carrying 12 well-heeled passengers and a million-dollar show horse. Initially, it appears the victim was trampled to death, but Grissom and Catherine uncover evidence of foul play. Meanwhile, in the Hell's Gate section of Death Valley, Sara and Warrick probe the apparent suicide of a 15-year-old boy found under a bedspread. The investigation intensifies when a girl's body turns up a half-mile away.

The Crime Scene crew investigates the gruesome murder of a high-powered, widowed lawyer, while Ray faces that it is time to move on from his old life.

Langston and Riley are taken hostage during the aftermath of a shootout in an usually calm Las Vegas community.

Two secretaries on holiday from Arizona attempt to steal a man's wallet and ATM pin number in a scam, and wind up dead in different locations. Meanwhile, the CSI team also investigates a disturbing medical mystery involving the dumping of human organs in a wildlife refuge.

Brass, Catherine, Grissom and Nick work the case of a female victim found in an apartment building with a gun shot wound. Drops becomes a person of interest during the investigation, even though he is still in jail.

Grissom, Catherine and Nick investigate the death of a runner during a competition. Meanwhile Sara and Warrick investigate the death of couple in a hotel room, initially thought to be a murder-suicide. Both cases take place during this 'cop' competition , with more than 20.000 attendants (all of them cops). This gives the investigations an interesting turn, as almost all the suspects and all dead people are cops.

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.

Grissom is confronted with new evidence while on the stand of a murder trial of a restaurant owner. This development requires the reopening of the case and Eckley initiates an inquiry into Grissom and his team. The results of the inquiry lead to dramatic changes of the CSI team and the series.

Several suspects in a murder case are UFO-club members who believe shape-shifting aliens have been working to conquer the human race for centuries

Grissom and Warrick get the case of an old woman found mummified in her closet. Sarah and Nick arrive to investigate a breaking and entering to find a raped teen. These cases are not as disparate as they first seem. Catherine looks into a gun found by a boy. The gun is connected to a week old murder across town that Warrick caught.

Grissom and Sara are called to the crime scene when two murder victims are found hidden in pipes at a construction site in the middle of an alfalfa field, while Catherine and Nick investigate an ostensible hunting accident.

After a man is killed in his limousine, Greg finds that the murder victim has ties to the man he had to kill in self-defense. The team finds that the brother is involved in this investigation and has to deal with him and his hostile mother.

After a beloved college football coach is found dead and his house drenched and spattered with his blood, the CSI team hunts for the killer who didn't find Coach Jimmy lovable at all.

A robbery at a grocery store results in a shootout leaving five dead. The police officer at the scene believes Grissom has a grudge against him. The entire team has to process the enormous amount of evidence at the scene.

The CSI team reopens a 10-year-old murder/suicide case when the sole survivor claims her accused father was innocent.

A band of vicious bikers is given the go-ahead to take down one of their own when it's discovered that the guy is an undercover cop.

Catherine and Sara deal with the death of what at first seems to be a transvestite. Later during autopsy they find out that the make-up he seemed to be wearing was actually facepaint, he was a clown. Grissom, Nick, and Warrick deal with the death of a man in a homeless area. They found out he worked in a recovery center for drug users.

Catherine and Brass investigate the case in which a man is found dead in a dumpster. It soon turns out the man had a serious food problem. The trail of his death soon leads to a hotdog-eating contest.Meanwhile, Nick and Sara investigate a not-so-amicable divorce with a bizarre twist. So bizarre it eventually lead to murder when both are found dead and it looks like the dog killed one of them.

Catherine, Warrick and Nick find the body of two women at a construction site buried under tar. The swing shift are brought into the world of foreign "mail-order" brides. Sara and Catherine have a dispute in which Sara gets suspended by Ecklie for acting insubordinately towards Catherine and himself. Sara opens up to Grissom about her childhood past.

A suspect's infatuation with Catherine results in her taking over a high profile case. The case is a missing woman who aspired to be a showgirl. Sara and Nick are angered since it takes the career making case away from them.

A bowling tournament is disrupted when an important piece of evidence is uncovered, leading the CSIs to investigate a murder at the same bowling alley.

Grissom investigates the murders of four monks who were shot point blank while chanting in a Buddhist temple; Catherine reopens a cold case in which her best friend was murdered, after the man convicted of the crime claims he's innocent shortly before he dies.

Catherine, Nick, and Sara investigate a seemingly months old body found in the mountains. Discovery of the man's identity lead the team to the world of robot wars. Warrick and Grissom look into the case of a man found murdered in an alley. Complicating their efforts, the medical examiner ""lost"" the body for 11 days. Greg helps this case by doing some undercover work.

A teenager is found murdered on a construction site. Grissom, Sarah, and Warrick follow the lead of blood on a hammer. Nick, with an assist from Catherine, tries to find how a woman was killed by a gunshot on her lawn when no one nearby had a gun.

Langston and Nick are called to investigate a murder at a fast food restaurant and have quite a task ahead of them when they discover that much of the evidence is coated in cooking oil.

A mutilated female body is discovered tied to the undercarriage of a bus carrying prisoners from a women's correctional facility after a severed arm flies out from beneath the vehicle and strikes a car. Catherine leads the investigation and at first believes the woman was escaping, but the evidence increasingly points to murder. Back in town, Warrick probes the death of a gambler who was stabbed multiple times in his brother's kitchen.

A body with unusual burn marks is discovered on the side of the road; Greg asks a teacher (Dita von Teese) out on a date.

When Hodges and Wendy take a group of high school CSI Explorer Scouts on a field trip, they embellish their role in solving cases and take their assignment a little bit too far.

Grissom attempts to get a confession from a neighborhood pedophile by having him help in locating two missing boys. The sex offender is the main suspect. The investigation is more complex than the team ever thought it would be.

Some bird watchers find a raven with a human eyeball in its beak. This eventually leads our CSIs to a divorced man and his 2 children but not much else. Warrick and Grissom look into the circumstances of David's unusual and first autopsy. This takes them to a car dealership where the man worked.

The whole team must investigate a crime where a husband and his porn star wife were murdered execution style. Things get personal for Catherine when Grissom talks to her about her evaluation. Brass believes that Sara may have some type of problem.

A middleweight boxing champ dies in the ring after taking a brutal beating from his nemesis, but Grissom finds evidence that points to murder. Outside, in a nearby parking lot, Catherine works a crime scene where a Los Angeles gang member was gunned down, apparently by a rival gang. Also, Nick investigates a jewelry-store robbery.

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

The CSIs' investigation of the victim of an apparent hit and run leads them into the world of aeronautics.

Grissom and Nick investigate the death of a book restorer while Catherine and Sara are called to the scene of a fatal train crash.

The lone holdout on a jury is found dead in the jury room. The eleven jurors who were voting guilty and who hated the dead juror are the natural suspects. Nick reopens a four year old case when the sister of the victim comes forward with new evidence.

A woman is found dead in a hotel suite with symptoms of the ebola virus. Another woman is found dead with similar symptoms. Catherine and Nick investigate. Sara and Greg with help from Grissom try to determine how a the owner of a home was killed. His home was tented for infestation.

An up-and-coming movie star is found dead in his hotel room after a night of partying with his groupies.

Grissom and Sara investigate the murder of a mental-hospital patient and quickly narrow down the suspects to a handful of other patients and staff members.

Catherine and Nick become absorbed in the dangerous world of street racing after one of the illegal sport's hotshot drivers is found dead out in the desert at an abandoned airstrip. Back in town, Grissom and his crew probe the sudden death of a renowned poker player who suffered a violent convulsion in the middle of a high-stakes game with three others. It looks like natural causes, at first, but Grissom suspects foul play.

Two men are found murdered after scamming Sam Braun's casinos. Grissom and Warrick investigate after Catherine is thrown off the case. One of the suspects is the son of a man Braun caught cheating. Nick gets the promotion that Sara coveted.

A hypnotist bank robber becomes the prime suspect in a murder investigation.

Catherine, Nick, and Warrick investigate a badly mutilated body in the woods. The cause of death was a shotgun blast. Nearby is a beaver dam made in part with cash. Grissom, Sarah, and Nick try to determine how a man was killed in a hotel room. It leads them to a convention of big women.

The CSIs investigate a man's claim that his wife fell down a set of stairs in their home.

Grissom, Warrick, and Nick investigate the case of man who apparently was murdered and pushed off a six story building. Grissom's involvement is cut short by renewed hearing problems. Catherine looks into the murder of man outside of his regular bar.

Heavy rains in Vegas wash up a body in the storm drains. As the team investigates, they find bones from another murder.