
Evanston, Illinois, USA
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.

as Gil Grissom

as Gil Grissom
2000

as Self - Guest
1993

as Gil Grissom
2002

as (segment "Need to Know")
1985

as Self
1987

as Gil Grissom
2021

as Col. Emmett Darrow
2014

as Georgie
1993

as Steve Walker
1996

as Mitch
2012

as Mr. 'Sarge' Kepler
2011

as Juror 12
1997
as Gil Grissom
2015

as Ted
2021

as Self
2018

as Gil Grissom
2015

as Self - Narrator (voice)
2014

as Trucker
2012

as Mr. 'Sarge' Kepler
2011

as Himself
2004

as Narrator
2004

as Self
2003

as Narrator
2001

as Himself
2001

as Jackson Connolly
2001

as Jack Hathaway
2000

as Ames Levritt
2000

as Jess
1998

as John F. Kennedy
1998

as Joad
1998

as Jake Bridges
1998

as Juror 12
1997

as Whip Dalton
1996

as Jack Flynn
1996

as Steve Walker
1996

as Tony C.
1995

as Stephen Guerin
1993
as Gil Grissom
1 ep.

as Gil Grissom
194 episodes

as Self - Guest
1 episodes

as Gil Grissom
1 episodes

as (segment "Need to Know")
1 episodes

as Self
1 episodes

as Gil Grissom
10 episodes

as Col. Emmett Darrow
10 episodes

as Georgie
1 episodes

as Mitch
1 episodes

as Self
1 episodes

as Captain Gideon Walker
4 episodes

as Whip Dalton
2 episodes

as Joseph P. Kennedy Sr.
3 episodes
Executive Producer