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Watch CSI Season 12 full episodes online, free and paid options via our partners and affiliates.
The CSI team investigates when three bodies are found near a campaign dinner on the show's 12th season finale.
The CSI team investigates when a racer is killed by a bomb.
A conviction may get overturned if Nick and the team can't find new evidence as time runs out.
A man gets killed inside a casino on this episode of CSI. At point-blank range.
A murder and a robbery both take place at a wedding on CSI this week, while Hodges tries to pull one over on his mother.
The team tackles a new intriguing case on the CSI episode "Trends with Benefits."
A blackout cripples the city and causes major problems for the CSIs this week. They must go old school!
When a house is stolen completely off its foundation, the CSIs are on the case in search of answers.
Jesse McCartney guest stars on this episode of CSI. He plays the character of Wes Clyborn.
The CSI investigation takes Nick into a wig shop on this episode of the CBS drama.
So long, Cathrine. This episode marks the final one for the long-time, iconic character.
This is the first of Catherine's final two episodes. It features Annabeth Gish as a guest star.
The home of Dr. Robbins becomes a crime scene on this edition of CSI. It's the final installment of 2011.
A retired Army Ranger is found dead this week. As a result, the FBI is brought in for the case.