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.
Frequent co-stars
18
Titles
61
Rust
Blackburn • 2025
Movie
★7/10
No Address
Harris • 2025
Movie
★7/10
Reagan
George Schultz • 2024
Movie
★6/10
Butcher's Crossing
Charlie Hoge • 2023
Movie
★6/10
Heightened
Gordon • 2023
Movie
★5/10
The Dark and the Wicked
Priest • 2020
Movie
★6/10
City of Lies
Edwards • 2018
Movie
★6/10
Proud Mary
Uncle • 2018
Movie
★6/10
Shot
Dr. Roberts • 2017
Movie
★7/10
Allegiant
Phillip • 2016
Movie
★6/10
Solace
Mr. Ellis • 2015
Movie
★6/10
Son of Batman
Dr. Kirk Langstrom (voice) • 2014
Movie
★7/10
Transcendence
Dr. Thomas Casey • 2014
Movie
★6/10
Louder Than Words
Dr. Lansen • 2013
Movie
★6/10
That Guy... Who Was in That Thing
Self • 2012
Movie
★6/10
The Booth at the End
The Man • 2011
Series
★8/10
Seeking Justice
Lieutenant Durgan • 2011
Movie
★6/10
Girl Walks Into a Bar
Moe • 2011
Movie
★5/10
Kick-Ass
Detective Gigante • 2010
Movie
★7/10
Faster
Sergeant Mallory • 2010
Movie
★6/10
Luster
Detective Carter • 2010
Movie
★5/10
Superman/Batman: Public Enemies
Captain Atom (voice) • 2009
Movie
★7/10
Year One
King • 2009
Movie
★5/10
Taken
Stuart St. John • 2008
Movie
★7/10
Fracture
Judge Moran • 2007
Movie
★7/10
Seraphim Falls
Railroad Foreman • 2007
Movie
★6/10
Magma: Volcanic Disaster
Peter Shepherd • 2006
Movie
★6/10
North Country
Arlen Pavich • 2005
Movie
★7/10
Standing Still
Jonathan • 2005
Movie
★5/10
In Enemy Hands
Admiral Kentz • 2004
Movie
★6/10
Quicksand
Joey Patterson • 2003
Movie
★5/10
The Man from Elysian Fields
Virgil Koster • 2001
Movie
★6/10
Shanghai Noon
Nathan Van Cleef • 2000
Movie
★6/10
Timecode
Evan Wantz • 2000
Movie
★6/10
Universal Soldier: The Return
Dr. Dylan Cotner • 1999
Movie
★6/10
Phoenix
Lt. Clyde Webber • 1998
Movie
★5/10
Gattaca
Dr. Lamar • 1997
Movie
★8/10
Amistad
Hammond • 1997
Movie
★7/10
Air Force One
Agent Gibbs • 1997
Movie
★7/10
The Killing Jar
Danny “Figaretto” Evans • 1997
Movie
★4/10
A Family Thing
Sunburned Man • 1996
Movie
★6/10
Bulletproof
Gentry • 1996
Movie
★6/10
Persons Unknown
Tosh • 1996
Movie
★5/10
Poison Ivy 2: Lily
Donald Falk • 1996
Movie
★5/10
Barb Wire
Alexander Willis • 1996
Movie
★4/10
Apollo 13
Henry Hurt • 1995
Movie
★7/10
Safe
Greg • 1995
Movie
★7/10
Roswell
Sherman Carson • 1994
Movie
★6/10