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