A man is chopped in half, and the lab tries to tie the case to a Japanese mobster, who seeks custody of his biological son, who was adopted by the victim. Meanwhile, Natalia's hearing loss nearly makes her a victim during the investigation.
A pornographer who was acquitted in Los Angeles for the murder of his wife is suspected of killing anther woman in Miami. Horatio and Delko travel to L.A. to further the investigation--and clear Jesse's Cardoza's name.
An office receptionist is killed with an ax at her workplace, and the team discovers that several employees held grudges against her, as well as a surprising tragic secret from her past.
An Iranian man is burned to death. The prime suspects include Horatio's son Kyle's army buddy Brian, who is on military furlough, as well as Brian's girlfriend, who was the victim's daughter.
While CSI tries to figure out who and what caused a fatal house fire, Calleigh communicates with the victim and searches for clues by means of an out-of-body experience while in a coma.
While investigating a murder that takes place during a diamond heist, the team discovers that the culprits weren't after the diamonds. Meanwhile, a package of diamonds is stolen from the evidence box at the crime lab.
The state's attorney Delko has been working with is killed by a car bomb. The car was stolen from Evidence just like the diamonds from the earlier case, and the evidence soon leads back to Wolfe.
Horatio suspects that a disgraced graduate psychology student is killing the people who caused her to fail, and is leaving cryptic messages for the crime lab. However, could it actually be part of an even more sinister plan?
Just days before the professional draft, a star college quarterback becomes the prime suspect in a murder investigation when the bottle girl at a night club is found dead in his cabana.
A blind man is the police's only witness in a kidnapping case, but he winds up pointing the finger at a familiar face who was supposedly in prison at the time of the abduction.
Memmo Fierro, the man who killed Horatio's wife and Delko's sister, escapes during a prison break, and is on a mission to find his daughter, who has been placed in foster care.
Horatio finds a confused, disoriented man in the Everglades next to a buried severed head, and soon discovers that the man may have committed the crime while in a dream-like trance.
A pregnant woman is found badly beaten, and the unborn child's life is in danger. And the investigation uncovers a complex conspiracy involving several angry parties.