With the help of Wolfe and an ATF agent, Horatio stages his own death as part of a plan to get Ron Saris and a shipment of fused-alloy bullets off the street.
As the team investigates a bomb explosion that killed a 17-year-old girl in a clothing store dressing room, Horatio discovers that Julia Winston and Kyle are facing new troubles.
A tanning butler is found murdered in a hotel bed next to a housewife-prostitute. However, the woman claims that she was drugged and has no recollection of the crime.
A baby girl is stolen from her mother in a crowded area in broad daylight, and the investigation takes an unlikely turn when CSI discovers that the mother's husband is not the biological father.
A sadistic killer of young women strikes again, one year after the original crime. However, CSI soon discovers that the trail may lead back to the police officer who investigated the original crime.
While investigating a homicide at a seedy motel, CSI discovers that Delko has been staying at the hotel and may have been the target of a shooting himself.
A reformed gang leader recently out of prison offers to help Horatio bring down his gang from the inside after it is suspected to be involved in the death of a community leader.
As CSI investigates the murder of a horse owner at a racetrack in his luxury box, Horatio uncovers a plot to fix races involving an old nemesis from the Russian mob.
Calleigh is in a coma after a smoke inhalation injury sustained while investigating a case involving a dead doctor, drug dealers, and black market organ transplants.
New evidence proves that a man recently convicted of murder is innocent. But are his defense attorney and judge conspiring to keep him behind bars to protect the real killer?
Defense attorney Derek Powell's fiancée is killed during a yacht heist, but the investigation may be compromised when Delko's citizenship is questioned and he is threatened with deportation to Cuba.
A man is hanged from a gazebo during his ex-wife's divorce party, and the investigation reveals that he was leading a double life. Meanwhile, Horatio gets Kyle a job working with the medical examiner.
A flight attendant is found dead after a flight in the baggage claim area, and the suspects include jealous coworkers, a drug-smuggling Federal Air Marshal, and a pilot cheating on his wife.
A plastic surgeon is killed by a wood chipper. During the investigation, Horatio discovers that his old nemesis Ron Saris is still alive and was one of the dead plastic surgeon's patients.
One of the finalists in a "Bachelor"-style reality show is killed, and the team must find the killer among the other contestants, the host, and perhaps even the "Bachelor" himself.
CSI connects a hand grenade explosion in a restaurant that killed two people to a credit card scam, while Horatio tries to help a waitress at the restaurant regain custody of her child.
Ron Saris has a connection to a series of deaths where the bodies were dissolved in sodium hydroxide, Wolfe exposes Dr. Price's prescription drug addiction, and Julia Winston is driven over the edge.
Ivan Sarnoff escapes an assassination attempt by the Russian mob, and is on the loose. Evidence also suggests that Delko's father was involved, while Yelina, working undercover, is asked to find Sarnoff and finish the job.
