A suicide victim leaves a tape, but the voice isn’t his. Warrick and Nick compete to solve their 100th case and Catherine comforts a sex crime victim.

A slot machine winner leaps to his death from a balcony. While, Catherine vows to solve Holly Gribbs’ murder, and Sara Sidle is on Warrick’s case.

Captain Brass investigates the murder of a woman. Meanwhile, Warrick and Catherine investigate a hit-and-run.

Grissom and Catherine investigate the murder of a wife. Nick and Sara are on a suicide case and a judge gives a proposal to clear Warrick’s debt.

Grissom realizes that his victim was chased to death. While, Nick and Catherine are on the murder of a dean and Sara inspects a body in a dumpster.

Grissom consults a forensic to aid his case. Catherine investigates a rape charge and Warrick and Sara must look into an officer-involved-shooting.

Grissom and his team investigate a mass murder and Catherine’s ex-husband reports her to child services for neglecting their daughter for her work

Grissom fears a serial killer may be at large and Warrick and Nick argue as to what happened when a tourist’s car flipped.

Inquiries of an apparent air rage incident force the investigators to decide if they have uncovered a murder or a case of self-defense at 30,000 feet.

Grissom and Sara probe a murder. Warrick and Catherine learn that their case is case of forgery; and Nick’s rethinks his case after a development.

Grissom tries tracing the serial killer. Warrick gets reinstated and Grissom assigns him to work as backup on Sara’s Cain and Abel murder case.

Grissom, Sara and Warrick work to prove innocence of a man accused of murder. Nick and Catherine, investigating murder, hear the brother’s confession

Grissom and the CSI team search for a serial bomber. Nick’s one-night stand with a call girl puts his DNA and fingerprints at the scene of her murder.

Upon discovery of a bone, Grissom and Catherine try to find the rest of the skeleton and Warrick and Sara trace the death of a male stripper.

A dead woman is found in a pool and the owner is missing, leading the team to suspect a double murder. Meanwhile, Warrick investigates a mob hit.

Sara gets involved in a rape and murder case. CSI team uses dogs to track a gangbanger. Catherine and Warrick are baffled by two version of a story.

Grissom, Nick and Catherine tackle a case within a case, with no obvious connection. Sara and Warrick investigate the gruesome death of woman.

The solitary witness of a double homicide tells the team the tale of a carjacking gone bad. Catherine deals with the death of three senior citizens.

The CSI team is called in to investigate an infant kidnapping case, but the evidence points to a cover-up of the truth that no one wants to believe.

The CSI team investigates the battered body of deaf man. Meanwhile Catherine and Nick deal with the carnage of a coffee shop massacre.

Grissom, Nick and Warrick investigate a dog attack on a jogger and Catherine becomes emotionally involved in the murder of a six year old girl.

CSI discover a head with a missing torso, Warrick agrees to investigate a volatile murder, and Grissom evaluates his team’s work over the last year.

Special Agents Culpepper and Grissom can’t seem to get along during a serial killer case who murdered three young women in Vegas.