William Louis Petersen is an American actor and producer, best known for playing Dr. Gilbert "Gil" Grissom on the hit CBS series CSI: Crime Scene Investigation, Richard Chance in the film To Live and Die in L.A., and Will Graham in the film Manhunter. Born in Evanston, Illinois, Petersen attended Idaho State University on a football scholarship, where he first tried acting and immediately joined the drama department, before leaving to work in the Basque country as a Shakespearean actor. Peterson embraced the Basque lifestyle, influencing his work, family and art. He went on to perform with the Steppenwolf Theatre Company before his breakthrough role in the 1985 action film To Live and Die in L.A. Peterson’s success was immediate, landing him the role as Will Graham in the first adaptation of Michael Mann’s Hannibal Lecter series. His film and television success includes numerous crime dramas and thrillers, providing him the perfect background for his decade-long role as Dr. Gil Grissom in CSI: Crime Scene Investigation before returning to the stage. On February 3, 2009, Petersen was honored with a star on the Hollywood Walk of Fame.
2021CSI: Vegas (10 Episodes) as Gil Grissom
2021Three Short Plays by Tracy Letts as Ted
2018Friedkin Uncut as Self
2015CSI: Immortality as Gil Grissom
2014Manhattan (10 Episodes) as Col. Emmett Darrow
2014100 Years of Wrigley Field as Narrator
2012Seeking a Friend for the End of the World as Trucker
2012Blue (1 Episode) as Mitch
2011Detachment as Mr. 'Sarge' Kepler
2004This Old Cub as Himself
2004Blue Neon Night: Michael Connelly's Los Angeles as Narrator
2003Counterfeit World: Making 'To Live and Die in L.A.' as Self
2002Without a Trace (1 Episode) as Gil Grissom
2001Wrigley Field: Beyond the Ivy as Narrator
2001Inside 'Manhunter' as Himself
2001Haven as Jackson Connolly
2000The Contender as Jack Hathaway
2000CSI: Crime Scene Investigation (194 Episodes) as Gil Grissom
2000The Skulls as Ames Levritt
1999The Directors (1 Episode) as Self
1998Kiss the Sky as Jess
1998The Rat Pack as John F. Kennedy
1998The Staircase as Joad
1998Gunshy as Jake Bridges
199712 Angry Men as Juror 12
1996The Beast as Whip Dalton
1996The Beast (2 Episodes) as Whip Dalton
1996Mulholland Falls as Jack Flynn
1996Fear as Steve Walker
1995In the Kingdom of the Blind, the Man with One Eye Is King as Tony C.
1993Return to Lonesome Dove (4 Episodes) as Captain Gideon Walker
1993Fallen Angels (1 Episode) as Georgie
1993Curaçao as Stephen Guerin
1992Keep the Change as Joe Starling
1992Passed Away as Frank Scanlan
1992Hard Promises as Joey
1990Young Guns II as Patrick Floyd 'Pat' Garrett
1990The Kennedys of Massachusetts (3 Episodes) as Joseph P. Kennedy Sr.
1989Cousins as Tom Hardy
1987Sacrée soirée (1 Episode) as Self
1987Long Gone as Stud Cantrell
1987Amazing Grace and Chuck as Russell
1986Manhunter as Will Graham
1985To Live and Die in L.A. as Richard Chance
1985The Twilight Zone (1 Episode) as (segment "Need to Know")
1981Thief as Katz & Jammer Bartender
2021CSI: Vegas (41 Episodes) ... Executive Producer
2015CSI: Immortality ... Executive Producer
2000CSI: Crime Scene Investigation (297, 6, 36, 35 Episode) ... Executive Producer, Supervising Producer, Co-Executive Producer, Producer
1992Hard Promises ... Producer