Mac barely escapes death after his kidnapping and quickly goes to work trying to track down the location and identity of the bank robber. During the investigation, CSI discovers that Flack's sister may have a connection.
CSI connects two radiation poisoning deaths to a dead librarian and the rare books collection at the New York Public Library. However, the life of the medical examiner is in the balance after he comes in contact with one of the bodies.
A fugitive posing as a Federal Air Marshal is found dead in an airplane bathroom, and CSI only has a limited amount of time to find the killer before the passengers are released.
A powerful business consultant is killed during an unrelated street party, and the motive appears to be related to her missing flash drive, which contains incriminating information against some of New York's most influential people.
While CSI investigates the death of a famed archaeologist, Stella's life is threatened over the archaeologist's possible discovery of a rare ancient Greek coin.
A man is found dead in a basement, but the house where the death occurred is found miles away on a barge in the East River. Meanwhile, Flack discovers that his sister lost her job and has a drinking problem.
When two men who share the same name as detective Mac Taylor are killed, detective Taylor rounds up all the other Mac Taylors in New York and tries to figure out who will be the next victim.
The remains of a pregnant 17-year-old are found in the trunk of a crushed car, but the baby is missing. During the investigation, Danny finds out some shocking news about Lindsay.
CSI investigates the death of a armored truck security guard, which appears to be related to a disturbance at a so-called "Bermuda Triangle" of electric activity near the Empire State Building.
Night find the big city as two NYPD officers come upon a young man attempting to put a young woman's body in the trunk of a car. When the police go after him, the young man is impaled on a fence, leaving many unanswered questions. Stella and Det. Angel investigate the death of a pawn shop owner that reveals an old foe is back.
When the deputy mayor is killed, suspicion quickly falls on a sleazy newspaper publisher. Meanwhile, the "blue flu" could cause problems between Danny and the crime lab.
An environmental terrorist group bombs the home of an electronics recycler, and his daughter is killed--but the daughter is part of the terrorist group. Meanwhile, Danny considers proposing to Lindsay again.
The lab makes a grisly discovery while investigating the death of a former medical examiner office employee's wife, and Stella sets up a trap for the Greek coin thieves.
A murder victim turns out to be a violent stalker, and the killer may be one of his stalking victims who learned to cover her tracks by attending one of Bonasera's college seminars.
A man is killed when he falls out a window in media mogul Robert Dunbrook's building, but did Dunbrook throw him? During the investigation, Mac discovers that the case is connected to an earlier case involving a missing flash drive.
A murder leads CSI to a group of white supremacists, the discovery of precious items stolen from Holocaust survivors, and perhaps the uncovering of a former Nazi guard.
Stella discovers that her old friend, Professor Papakota, may be connected to the Greek antiquities smuggling ring and travels to Greece to investigate.
A group of violent kidnappers capture Robert Dunbrook's son just before he is scheduled to testify against his father to a grand jury, and the CSI team is rocked by a tragedy.