Acting · Brooklyn, New York City, New York, USA · Born December 16, 1955
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.
MovieRecluse
2026
MovieOddities
2026
MovieNo Address
2025
as Harris
MovieRust
2024
as Blackburn
MovieAmericans with No Address
2024
as Self
MovieSchindler Space Architect
2024
as Frank Lloyd Wright (voice)
MovieReagan
2024
as George Schultz
TVStar Wars: Tales of the Empire
2024
as Gilad Pellaeon (voice)
MovieThe Ghost Trap
2024
as Maynard
MovieHeightened
2023
as Gordon
MovieButcher's Crossing
2023
as Charlie Hoge
MovieThe Audition
2022
as Joel
MovieAlchemy of the Spirit
2022
as Oliver
MovieThe Wall of Mexico
2020
as Michael Rand
TVDead Talk Live
2020
as Self - Guest
MovieThe Dark and the Wicked
2020
as Priest
TVFBI: Most Wanted
2020
as Maurice Hewitt
TVTruth Be Told
2019
as Lee Hackman
TVThe Mandalorian
2019
as Gilad Pellaeon
MovieDark Harbor
2019
as Priest James
MovieThe Maestro
2018
as Mario Castelnuovo-Tedesco
MovieCity of Lies
2018
as Edwards
MovieProud Mary
2018
as Uncle
MovieShot
2017
as Dr. Roberts
MovieBorn Guilty
2017
as Mr. Milk
TVMacGyver
2016
as General John Acosta
TVBull
2016
as Judge Hollingsworth
MovieMoments of Clarity
2016
as Artemis
MovieAllegiant
2016
as Phillip
TVSupergirl
2015
as Peter Lockwood
MovieSolace
2015
as Mr. Ellis
TVZoo
2015
as Ronnie 'Dogstick' Brannigan
MovieThe Gift
2015
as Forrest Bobo
TV12 Monkeys
2015
as Jonathan Foster
MovieSon of Batman
2014
as Dr. Kirk Langstrom (voice)
MovieThis Last Lonely Place
2014
as Frank Devore
TVSalem
2014
as Magistrat Hale
MovieSmall Time
2014
as Chick
MovieTranscendence
2014
as Dr. Thomas Casey
MovieETXR
2014
as Gordon Shafer
MoviePony
2014
as Uncle Jeff
MovieLive at the Foxes Den
2013
as Kenneth
MovieLouder Than Words
2013
as Dr. Lansen
TVBeware the Batman
2013
as Manhunter / Paul Kirk (voice)
MovieThat Guy... Who Was in That Thing
2012
as Self
TVLongmire
2012
as Jeremiah Rains
MovieTales of Everyday Magic
2012
as Peter Keller
MovieFive
2011
as Peter
MovieInside
2011
as H1ghway_man
MovieSeeking Justice
2011
as Lieutenant Durgan
TVThe Booth at the End
2011
as The Man
MovieGirl Walks Into a Bar
2011
as Moe
TVBeing Human
2011
as Liam McClean
MovieLuster
2010
as Detective Carter
MovieFaster
2010
as Sergeant Mallory
TVThe Walking Dead
2010
as Gregory
TVNikita
2010
as Percy Rose
MovieBelow the Beltway
2010
as McMahon
TVBen 10: Ultimate Alien
2010
as Warden Morgg / Trukk (voice)
MovieKick-Ass
2010
as Detective Gigante
TVJustified
2010
as Charles Monroe
MovieBedrooms
2010
as Harry
MovieWomen in Trouble
2009
as Mr. Frost
MovieSuperman/Batman: Public Enemies
2009
as Captain Atom (voice)
MovieRepo Chick
2009
as Father De La Chasse
MovieYear One
2009
as King
MovieCook County
2009
as Sonny
MovieThe Toe Tactic
2009
as Dad
MovieSparks
2009
as Sid Harris
MovieInside the Box
2009
as Fred O'Brien
TVBatman: The Brave and the Bold
2008
as Sinestro (voice)
TVThe Mentalist
2008
as Sheriff Thomas McAllister
MovieTaken
2008
as Stuart St. John
MovieFracture
2007
as Judge Moran
MovieSeraphim Falls
2007
as Railroad Foreman
The Garage
2006
as Doc Ruppert
TVJericho
2006
as John Smith (uncredited)
MovieOut There
2006
as Uncle Doug
MovieMagma: Volcanic Disaster
2006
as Peter Shepherd
TVCriminal Minds
2005
as Det. Hyde
TVBones
2005
as Dr. Bancroft
TVThe Closer
2005
as Detective Curt Landry
MovieDeepwater
2005
as Gus
MovieDrop Dead Sexy
2005
as Harkness
MovieNorth Country
2005
as Arlen Pavich
TVMedium
2005
as Mitchell Slocombe
MovieStanding Still
2005
as Jonathan
TV100 Scariest Movie Moments
2004
as Self
TVBoston Legal
2004
as A.D.A. Rex Swarthmore
TVThe Batman
2004
as Paul (voice)
MovieThe Last Full Measure
2004
MovieIn Enemy Hands
2004
as Admiral Kentz
MovieThe Third Date
2003
as Tommy Tulip
TVKaren Sisco
2003
as Alvin Simmons
TVTeen Titans
2003
as Mento / General Immortus (voice)
MovieQuicksand
2003
as Joey Patterson
TVThe Twilight Zone
2002
as Harry Kellogg
TVThe Court
2002
as Keith Nolan
MovieStorytelling
2001
as Mr. DeMarco
TVJustice League
2001
as General Brak / Soldier (voice)
TV24
2001
as George Mason
TVLaw & Order: Criminal Intent
2001
as George Pagolis
MovieThe Man from Elysian Fields
2001
as Virgil Koster
TVGoing to California
2001
as Clay Shelton
MovieChina: The Panda Adventure
2001
as Dakar Johnston
TVCSI: Crime Scene Investigation
2000
as Rory Atwater
MovieShanghai Noon
2000
as Nathan Van Cleef
MovieTimecode
2000
as Evan Wantz
TVThe West Wing
1999
as Franklin Hollis
MovieUniversal Soldier: The Return
1999
as Dr. Dylan Cotner
MovieNetForce
1999
as Bo Tyler
TVNetforce
1999
as Bo Tyler
TVBatman Beyond
1999
as Dr. Childes (voice)
MovieThe Cherry Orchard
1999
as Yepihodov
MovieWinchell
1998
as Gavreau
MoviePhoenix
1998
as Lt. Clyde Webber
TVThe Wild Thornberrys
1998
as Barking Deer #2 (voice)
MovieDriven
1998
as J.D. Johnson
The Truth About Juliet
1998
as George
MovieBreast Men
1997
as Male Interviewer
MovieAmistad
1997
as Hammond
MovieOne Night Stand
1997
as Charlie's Friend
TVThe Legend of Calamity Jane
1997
as Additional Voices (voice)
TVExtreme Ghostbusters
1997
MovieAir Force One
1997
as Agent Gibbs
MovieGattaca
1997
as Dr. Lamar
MovieThe Killing Jar
1997
as Danny “Figaretto” Evans
MoviePersons Unknown
1996
as Tosh
MovieApollo 11: First Steps on the Moon
1996
as Buzz Aldrin
MovieFor Hope
1996
as Date #4 (uncredited)
MovieIf These Walls Could Talk
1996
as John Barrows
MovieBulletproof
1996
as Gentry
TVSuperman: The Animated Series
1996
as Sgt. Corey Mills (voice)
TVWomen: Stories of Passion
1996
as Jimbo
MovieWithin the Rock
1996
as Ryan
MovieThe Rock
1996
as Lonner (uncredited)
MovieBarb Wire
1996
as Alexander Willis
MoviePoison Ivy 2: Lily
1996
as Donald Falk
MovieA Family Thing
1996
as Sunburned Man
TVNash Bridges
1996
as Neil Wojak
MovieA Kidnapping in the Family
1996
as Curtis Harrison
MovieHeat
1995
as Ralph
MovieLeaving Las Vegas
1995
as Cynical Cabbie
TVPartners
1995
as Christophe Nnngaarzh
MovieApollo 13
1995
as Henry Hurt
MovieSafe
1995
as Greg
TVThe Outer Limits
1995
as Terry McCammon
MovieThe Fifteen Minute Hamlet
1995
as Shakespeare
TVLife with Louie
1994
as Pro Shop Cashier (voice)
TVGargoyles
1994
as Iago (Voice)
MovieAttack of the 50 Ft. Woman
1994
as Second Man
TVER
1994
as Detective Wilson
TVThe Tick
1994
as Octopaganini (voice)
TVNew York Undercover
1994
as Dr Carl Weschler
MovieRoswell
1994
as Sherman Carson
TVDuckman
1994
as Hans (voice)
MovieCaroline at Midnight
1994
as Joey Szabo
MovieDonato and Daughter
1993
as Russ Loring
TVThe X-Files
1993
as Dr. Hodge
TVThe Adventures of Brisco County, Jr.
1993
as Brett Bones
TVGood Advice
1993
as Bernard
MovieIt's Nothing Personal
1993
as James Blakemore
MovieA Few Good Men
1992
as Capt. Whitaker
MovieDeadly Matrimony
1992
MovieCandyman
1992
as Trevor Lyle
MovieThe Gun in Betty Lou's Handbag
1992
as Marchat
MovieA Private Matter
1992
as Peter Zenner
MovieThe Keys
1992
as Harold
MovieFor the Boys
1991
as Roberts, Vietnam
MovieBilly Bathgate
1991
as Harvey Preston
MovieTerminator 2: Judgment Day
1991
as Todd Voight
MovieMurder in High Places
1991
as Wayne
MovieNot of This World
1991
as Bruce MacNamara
MovieDillinger
1991
as Harry Copeland
MovieThe Rookie
1990
as Blackwell
TVSuper Force
1990
as Dr. Landru
TVLaw & Order
1990
as Clay Pollack
MovieThe Grifters
1990
as Lt. Pierson
MovieShort Time
1990
as Stark
MovieThe Guardian
1990
as Detective
MovieThe Last of the Finest
1990
as Fast Eddie
MovieThe Assassin
1990
as John Patrick Earl
MovieThe Gumshoe Kid
1990
as Monty Griswold
TVGrand
1990
as Jeffrey
MovieInternal Affairs
1990
as Rudy Mohr
MovieThe Fabulous Baker Boys
1989
as Lloyd
MovieL.A. Takedown
1989
as Waingro
MovieDeadly Dreams
1988
as Jack Torme
MovieTapeheads
1988
as Ricky Fell
MovieThe Verne Miller Story
1988
as Cardogan
MovieThe Lawless Land
1988
as Ez Andy
MovieWalker
1987
as Byron Cole
TVWiseguy
1987
as Ray Spiotta
MovieStraight to Hell
1987
as Preacher McMahon
MovieOmega Syndrome
1986
as Yo-Yo
MovieSid and Nancy
1986
as Bowery Snax
TVThe Twilight Zone
1985
as (segment "Take My Life...Please!")
MovieVolunteers
1985
as Kent Sutcliffe
TVMoonlighting
1985
as Scalper
TVMiami Vice
1984
as Tommy Lowell
TVRiptide
1984
as Taxi Driver
TVThe A-Team
1983
as Baker
TVRemington Steele
1982
as Dan Kowalski
TVTales of the Gold Monkey
1982
as Eric Fromby
MovieTag: The Assassination Game
1982
as Connally
TVCagney & Lacey
1982
as Maurice
TVFalcon Crest
1981
as Buzz Whitehead
MovieFire on the Mountain
1981
MovieMommie Dearest
1981
as Christopher Crawford
TVHart to Hart
1979
as Christopher Hawks
TVThe Incredible Hulk
1977
as Tom
TVM*A*S*H
1972
as Marine
Paradise: Disturbed
MovieRelapse
as Seymour
Saving Black Bear
Path Lights
as Father
Day One
