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 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
Nick volunteers on his birthday to take a case involving a 16-year-old girl found dead in the parking lot of a seedy hotel, because he got to know the girl while investigating other cases at the hotel over the last year.
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 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.
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.