Mac needs the help of a convicted arsonist recently released from prison to investigate the death of one of his FDNY firefighter friends. ...

Arsonist Leonard Brooks strikes again, but CSI discovers that his mission this time is very personal. ...

A homicide on the Brooklyn Bridge leads Mac and Jo all the way to San Francisco to find a missing teenage girl, but they are not sure if she is dead or alive. ...

CSI searches for the shooter at a political rally, and the gun that he discarded in an alley afterwards is used in the accidental shooting death of a young girl. ...

A 20 year old cold case involving a missing boy is reignited when the suspected killer is murdered after returning to the old neighborhood. ...

While searching for a gun, the team stumbles on a dead body at the bottom of a Central Park pond. ...

The team must solve a series of murders whose victims, locations, and murder weapons all resemble elements of the board game Clue. ...

The team connects the murder of a high schooler to a classmate who was dealing his prescription meds, and Lindsey returns home to take care of some unfinished business. ...

The team discovers that a Dominican gang member found cut in half by a chainsaw has a connection to Flack's new partner. ...

CSI tries to figure out who killed one of the owners of a modern-day speakeasy, and Adam tries to get through unresolved issues while taking care of his sick father. ...

Two people are shot and killed with a gun that was printed from a computer, and Jo tries to uncover the identity of an anonymous philanthropist who is giving away million ...

A police officer is killed during a robbery, but is a gunshot victim in police custody a reluctant eyewitness or one of the robbers? ...

The team tries to figure out who killed a pick-pocket who fell from a building balcony onto a car, and Jo gets a visit from a man who has shocking news related to her dea ...

A pizza shop employee is killed over a package he was smuggling that was mistaken for drugs. ...

C.S.I. head Detective Mac Taylor and his team solve crimes in New York City. ...