The CSIs investigate when a fire chief - a friend of Mac's - is killed in a blaze that used the same technique as a recently paroled arsonist.

Source: CBS

The CSIs rush to stop serial arsonist Leonard Brooks after he begins using fire against people from his dark past



Source: CBS

Evidence found in photos at a crime scene on the Brooklyn Bridge send Mac and Jo to San Francisco in search of a missing teenage girl.

Source: CBS

The CSIs race to catch a shooter when Lindsay is injured during the attempted murder of a political candidate, and the events in the aftermath lead to a child's death.

Source: CBS

Mac investigates a 20-year-old case involving a missing boy when the prime suspect is found murdered on the anniversary of the boy's disappearance. Meanwhile, Flack's day off helps him deal with some lingering family issues.

Source: CBS

The CSIs investigate a twisted fairy tale when a woman in a ball gown is found at the bottom of the pond outside Belvedere Castle in Central Park.

Source: CBS

When a psychiatrist's patients are being systematically murdered, the CSIs are forced to play along in a game of Clue in order to catch the killer.

Source: CBS

The team's latest case leads them into the world of performance enhancing drugs. Meanwhile, Lindsay travels to Montana for the execution of Daniel Katums.

Source: CBS

Detective Lovato's past as an undercover officer tangles up with her present duty when one of the gang members she ingratiated herself in and developed feelings for turns up tortured and killed.

Source: CBS

The co-owner of a popular bar is found dead. Mac follows Christine's advice to tear his to-do list up and relax on his day off which will lead to Mac sharing lunch and memories with a complete stranger.

Source: CBS

The CSIs are confronted with a puzzling mystery when two different victims are linked by the same unusual weapon.

Source: CBS

When a beloved off-duty NYPD officer perishes in a robbery, the CSIs use the art of interrogation to break down their suspects and get to the truth.

Source: CBS

The CSIs investigate when a masked man is found at the bottom of a notorious skyscraper known for its history of mysterious deaths. Meanwhile, on her day off, Jo runs into a stranger with a surprising link to her past.

Source: CBS

When a young pizza maker is carjacked, the CSIs must determine what the perpetrators were really after.

Source: CBS

Mac and the team partner with D.B. Russell to outsmart Christine's kidnappers before they run out of time to save her life, in the second part of a two-part crossover.

Source: CBS

On Valentine's Day, Mac and the team tackle three twisted tales of love gone wrong.

Source: CBS

Unrest erupts in a community where an unarmed man was shot by police which means the CSI team needs to work as fast as possible to solve the case.