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.
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.
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.
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 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.
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.
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.