William Petersen as Gil Grissom

William Petersen exited CSI Gil Grissom in 2009. But he always remained opening to returning to the show briefly.
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Back on CSI

Justin Bieber is seen here on the episode "Targets of Obsessions." He plays a teen named Jason McCann.
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Tracee Ellis Ross on CSI

Tracee Ellis Ross guest stars on the 2/10/11 episode of CSI. Who does she play? The wife of Ray Langston.
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Marlee Matlin on CSI

Sara is in for a surprise: she's looking here at an ex-girlfriend of Grissom's, played by Oscar winner Marlee Matlin.
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Dita Von Teese on CSI

Dita Von Teese gets down to business in this scene from CSI. She portrays a forensic enthusiast that catches the eye of Nick.
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Carot Top on CSI

Yes, this is a picture of Carot Top. He guest starred on the first CSI episode of 2011.
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Justin Bieber on CSI

Justin Bieber is seen here as Jason McCann. It's a role he reprises on the 2010-2011 season of CSI.
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Sara at Work

This is a scene from the episode "418/427." Sara and the team are on the case of a man suspected of killing a FBI agent's wife.
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Nick in Action

Do your thing, Nick! The CSI tackles a man in this scene from "418/427."
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Catherine and Nick

Catherine and Nick are seen here on the episode "418/427." They are on the trail of a suspect/pedophile.
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Sara and Greg

Did a man kill himself, or was he killed? That's the question on "Wild Life," from which this photo is taken.
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Reed, Langston and Stokes

Reed, Langston and Stokes work together on the episode "Fracked." They look into the murder of two men that were set to blow the whistle on a large company.
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CSI Quotes

Nick Stokes: Open bottle of Vodka, a used glass. What do you think; one last drink?
Greg Sanders: One last laugh.

Dr. Robbins: A racist gets stabbed before he can drown. Some would call that justice.
Ray Langston: We still have to call it murder.