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

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.

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.

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

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

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

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.

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

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

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.

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 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.

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

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.

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 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."

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.

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

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 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.

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

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

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.

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.

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.

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

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

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.

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

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.

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.

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.

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.

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.