Two couples meet in a bar and one of the couples is murdered. When a second couple is murdered in a similar fashion the team suspects a pair of serial killers are on the loose.

When the lead suspects in Grissom's serial killer case are murdered, Grissom suspects an inside job.

Grissom and Warrick get the case of an old woman found mummified in her closet. Sara and Nick arrive to investigate a breaking and entering to find a raped teen.

During Vegas' latest Heat wave of triple digit temperatures, Gil and Catherine investigate a baby locked in a car. Warrick investigates a man's death of an apparent heat stroke in his house. Nick and Sara investigate a woman's body found floating in the lake with a blow to the head.

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.

A severed head is shipped to Dr. Robbins from Jackpot, Nevada. Grissom goes to Jackpot to find the rest of the body and gets very little cooperation from the locals.

Warrick's appearance at the preliminary hearing on a rape and murder case goes terribly wrong when the only piece of evidence is thrown out on a technicality.

A suspect's infatuation with Catherine results in her taking over a high profile case.

The sheriff is under political pressure to find who killed an air marshal with a car bomb that the sheriff witnessed.

A teenager is found murdered on a construction site. Grissom, Sara, 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.

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

A woman found murdered in her home. Her resemblance to Sara causes Grissom to take a personal interest in the case and forces him to examine the decisions he has made in his life.

Grissom, Sara, and Nick respond to an electrocution at a casino. The casino is hosting Japanese antiquities. The electrocution is just a ruse to steal the central piece of the exhibit.

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 whole team must investigate a crime where a husband and his porn star wife were murdered execution style.

Catherine and Sara deal with the death of what at first seems to be a transvestite.

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.

A violent murder in a casino parking garage and another episode in the police interview room lead the CSIs to one shocking discovery after another.

Warrick, Catherine, and Nick try to determine the cause of a house fire that kills a teenage girl. 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.

Grissom, Catherine and Nick investigate the death of a runner during a competition. Meanwhile Sara and Warrick investigate the death of a couple in a hotel room, initially thought to be a murder-suicide.

A roller coaster runs off its track, leaving six people dead. The CSI team investigates whether this was an accident or foul play.

Two young men are found murdered after scamming Sam Braun's casinos.

A casino employee is beaten and raped on her way home from work, but she survives and identifies her attacker.