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.
A man desperate for justice creates a hostage situation at the Miami/Dade Police Department, and Horatio looks into his claims. One of the hostages is Jesse Cardoza, a former CSI who is returning to his old job.
A "cougar" is romantically connected to three victims who were electrocuted during a beach volleyball tournament, and the internal investigation into Calleigh and Delko comes to a conclusion.
An investment broker who stole millions is found dead in his plane, and the investigation reveals no shortage of people who wanted to kill him--but none of the money he stole.
While investigating an e. coli-related death, the team finds itself stonewalled by a powerful corporate interest, and the case takes a serious emotional toll on Delko.
Horatio Caine calls Las Vegas CSI Dr. Ray Langston to come to Miami when a severed leg found in the Everglades is discovered to belong to a girl who went missing in Las Vegas a week earlier.
The team suspects that a company is killing its employees in order to collect on the insurance policies it put out on them, and a mysterious woman from Jesse's past returns.
The team finds the body of a dead census report taker in the trunk of a car, and the investigation takes a dangerous turn when it leads Wolfe and Boa Vista to a booby-trapped meth lab in an abandoned foreclosed home.