Summary: 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.

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

Summary: 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.

Summary: 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.

Summary: Mac investigates a 20 year old case when the prime suspect is found murdered on the anniversary of the boy's disappearance.

Summary: 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.

Summary: 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.

Summary: The CSIs must delve into the high-pressure world of an elite prep schools when a student is murdered while studying for the SAT'S. Meanwhile, Lindsay returns home to Montana to visit her father and deal with some issues from her past.

Summary: When Det. Lovato's cover is inadvertently blown, the CSI's investigate the Latin street gang she infiltrated when undercover.

Summary: The CSIs investigate a 1920s-inspired speakeasy when one of its owners is murdered and $10,000 goes missing. Meanwhile, Adam spends his day off in an unexpected way.

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

Summary: 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.

Summary: 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.

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

Summary: Mac and the team partner with D.B. Russell to outsmart Christine's kidnappers before they run out of time to save her life.

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

Summary: Community unrest over the police shooting of an unarmed man forces Mac and the team to move quickly to solve the case.