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.
Known For
The Rock
(1996)
Lonner (uncredited)
Heat
(1995)
Ralph
Allegiant
(2016)
Phillip
Gattaca
(1997)
Dr. Lamar
Terminator 2: Judgment Day
(1991)
Todd Voight
Taken
(2008)
Stuart St John
A Few Good Men
(1992)
Capt. Whitaker
Candyman
(1992)
Trevor Lyle
Kick-Ass
(2010)
Detective Vic Gigante
Apollo 13
(1995)
Henry Hurt
Storytelling
(2001)
Mr. DeMarco
Transcendence
(2014)
Dr. Thomas Casey
Fracture
(2007)
Judge Moran
Faster
(2010)
Sergeant Mallory
The Dark and the Wicked
(2020)
Priest
The Rookie
(1990)
Blackwell
Full Filmography
Acting
Mommie Dearest
(1981)
Christopher Crawford
Fire on the Mountain
(1981)
Tag: The Assassination Game
(1982)
Connally
Volunteers
(1985)
Kent Sutcliffe
Sid and Nancy
(1986)
Bowery Snax
Omega Syndrome
(1986)
Yo-Yo
Straight to Hell
(1987)
Preacher McMahon
Walker
(1987)
Byron Cole
Tapeheads
(1988)
Ricky Fell
The Lawless Land
(1988)
Ez Andy
The Verne Miller Story
(1988)
Cardogan
Deadly Dreams
(1988)
Jack Torme
The Fabulous Baker Boys
(1989)
Lloyd
L.A. Takedown
(1989)
Waingro
Short Time
(1990)
Stark
The Guardian
(1990)
Detective
The Last of the Finest
(1990)
Fast Eddie
The Rookie
(1990)
Blackwell
The Assassin
(1990)
John Patrick Earl
Internal Affairs
(1990)
Rudy Mohr
The Grifters
(1990)
Lt. Pierson
The Gumshoe Kid
(1990)
Monty Griswold
Not of This World
(1991)
Bruce MacNamara
Dillinger
(1991)
Harry Copeland
For the Boys
(1991)
Roberts, Vietnam
Terminator 2: Judgment Day
(1991)
Todd Voight
Murder in High Places
(1991)
Wayne
Billy Bathgate
(1991)
Harvey Preston
Candyman
(1992)
Trevor Lyle
The Gun in Betty Lou's Handbag
(1992)
Marchat
A Private Matter
(1992)
Peter Zenner
A Few Good Men
(1992)
Capt. Whitaker
The Keys
(1992)
Harold
Deadly Matrimony
(1992)
Kozolowski
It's Nothing Personal
(1993)
James Blakemore
Donato and Daughter
(1993)
Russ Loring
Roswell
(1994)
Sherman Carson
Attack of the 50 Ft. Woman
(1994)
Second Man
Caroline at Midnight
(1994)
Joey Szabo
The Fifteen Minute Hamlet
(1995)
Shakespeare
Leaving Las Vegas
(1995)
Cynical Cabbie
Safe
(1995)
Greg
Apollo 13
(1995)
Henry Hurt
Heat
(1995)
Ralph
Persons Unknown
(1996)
Tosh
Poison Ivy 2: Lily
(1996)
Donald Falk
Bulletproof
(1996)
Gentry
For Hope
(1996)
Date #4 (uncredited)
Within the Rock
(1996)
Ryan
The Rock
(1996)
Lonner (uncredited)
If These Walls Could Talk
(1996)
John Barrows
Barb Wire
(1996)
Alexander Willis
A Kidnapping in the Family
(1996)
A Family Thing
(1996)
Sunburned Man
Apollo 11: First Steps on the Moon
(1996)
Buzz Aldrin
Air Force One
(1997)
Secret Service Agent Gibbs
Gattaca
(1997)
Dr. Lamar
Amistad
(1997)
Hammond
The Killing Jar
(1997)
Breast Men
(1997)
Male Interviewer
The Truth About Juliet
(1998)
George
Driven
(1998)
J.D. Johnson
Phoenix
(1998)
Lt. Clyde Webber
Winchell
(1998)
Gavreau
NetForce
(1999)
Bo Tyler
The Cherry Orchard
(1999)
Yepihodov
Universal Soldier: The Return
(1999)
Dr. Dylan Cotner
Timecode
(2000)
Evan Wantz
Shanghai Noon
(2000)
Nathan Van Cleef
China: The Panda Adventure
(2001)
Dakar Johnston
The Man from Elysian Fields
(2001)
Virgil Koster
Storytelling
(2001)
Mr. DeMarco
The Third Date
(2003)
Tommy Tulip
Quicksand
(2003)
Joey Patterson
Drop Dead Sexy
(2005)
Harkness
North Country
(2005)
Arlen Pavich
Deepwater
(2005)
Gus
In Enemy Hands
(2005)
Admiral Kentz
Standing Still
(2005)
Jonathan
Out There
(2006)
Uncle Doug
Magma: Volcanic Disaster
(2006)
Peter Shepherd
The Garage
(2006)
Seraphim Falls
(2007)
Railroad Foreman
Fracture
(2007)
Judge Moran
Taken
(2008)
Stuart St John
The Toe Tactic
(2009)
Dad
Year One
(2009)
King
Sparks
(2009)
Sid Harris
Cook County
(2009)
Sonny
Superman/Batman: Public Enemies
(2009)
Captain Atom (voice)
Women in Trouble
(2009)
Mr. Frost
Repo Chick
(2009)
Father De La Chasse
Below the Beltway
(2010)
McMahon
Faster
(2010)
Sergeant Mallory
Luster
(2010)
Detective Carter
Bedrooms
(2010)
Harry
Kick-Ass
(2010)
Detective Vic Gigante
Seeking Justice
(2011)
Lieutenant Durgan
Girl Walks Into a Bar
(2011)
Moe
Five
(2011)
Peter
That Guy... Who Was in That Thing
(2012)
Self
Tales of Everyday Magic
(2012)
Live at the Foxes Den
(2013)
Kenneth
Louder Than Words
(2013)
Dr. Lansen
Transcendence
(2014)
Dr. Thomas Casey
Son of Batman
(2014)
Dr. Kirk Langstrom (voice)
This Last Lonely Place
(2014)
Frank Devore
Pony
(2014)
Uncle Jeff
Small Time
(2014)
Chick
The Gift
(2015)
Forrest Bobo
Solace
(2015)
Mr. Ellis
Allegiant
(2016)
Phillip
Moments of Clarity
(2016)
Artemis
Born Guilty
(2017)
Mr. Milk
Shot
(2017)
Dr. Roberts
City of Lies
(2018)
Edwards
Proud Mary
(2018)
Uncle
Dark Harbor
(2019)
Priest James
The Maestro
(2020)
Mario Castelnuovo-Tedesco
The Wall of Mexico
(2020)
Michael Rand
The Dark and the Wicked
(2020)
Priest
Alchemy of the Spirit
(2022)
The Audition
(2022)
Joel
Heightened
(2023)
Gordon
Butcher's Crossing
(2023)
Charlie Hoge
Production