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Xander Berkeley

Alexander Harper Berkeley (born December 16, 1955) is an American actor. He is known for his television roles as Sheriff Thomas McAllister on the crime drama The Mentalist, George Mason on the political thriller series 24, Percy Rose on the action thriller series Nikita, the Man on The Booth At The End and Gregory in AMC's The Walking Dead. His notable film roles include Todd Voight in Terminator 2: Judgment Day, Agent Gibbs in Air Force One, Bowery Snax in Sid and Nancy, Dr. Lamar in Gattaca, Trevor Lyle in Candyman and Ralph in Heat.

Filmography

2025
Rust

as Blackburn

Movie
2010
Kick-Ass

as Detective Gigante

Movie
2009
Year One

as King

Movie
2008
Taken

as Stuart St. John

Movie
2007
Seraphim Falls

as Railroad Foreman

Movie
2000
Shanghai Noon

as Nathan Van Cleef

Movie
1997
Gattaca

as Dr. Lamar

Movie
1997
Air Force One

as Agent Gibbs

Movie
1995
Heat

as Ralph

Movie
1995
Apollo 13

as Henry Hurt

Movie
1992
A Few Good Men

as Capt. Whitaker

Movie
1992
Candyman

as Trevor Lyle

Movie
1991
Terminator 2: Judgment Day

as Todd Voight

Movie
2008
The Mentalist

as Sheriff Thomas McAllister

TV Show
2001
24

as George Mason

TV Show