Alexander Harper Berkeley (born December 16, 1955) is an American actor. Since beginning his career in the early 1980s, he has appeared in over 200 film and television projects. His films include Terminator 2: Judgment Day (1991), Candyman (1992), Apollo 13, Barb Wire (1996), Air Force One (1997), Gattaca (1997), and Shanghai Noon (2000). He also appeared in the crime dramas L.A. Takedown (1989) and its remake Heat (1995), although he played a different character in each film. On television, he headlined the Citytv psychological thriller The Booth at the End (2010–2012) and was a series regular on the Fox action drama 24 (2001–2003) and The CW action thriller Nikita (2010–2012). As a guest star, Berkeley portrayed Sheriff Thomas McAllister on the CBS drama The Mentalist (2008–2013). He played a major supporting role as Gregory on the AMC post-apocalyptic horror The Walking Dead (2016–2018).

Early life and education Berkeley was born in Brooklyn and raised in New Jersey. He is of English and Scottish descent. He attended Hampshire College, and worked in theaters at the Five Colleges, including Smith, Mount Holyoke, Amherst and the University of Massachusetts. He worked in regional and repertory theaters in addition to Off-Broadway in New York City. A casting agent spotted Berkeley in a play written by Reynolds Price called Early Dark and encouraged him to move to Hollywood.

Career

Berkeley began playing roles in 1981, with early appearances in M*A*S*H, Cagney & Lacey, Remington Steele, Miami Vice, Moonlighting, and The A-Team. His later television roles included The X-Files, CSI: Crime Scene Investigation, ER and Law & Order.

On screen, his first film role was as the adult version of Christopher Crawford, Christina Crawford's brother, in Mommie Dearest. He has appeared in North Country, Terminator 2: Judgment Day, Phoenix, Kick-Ass, A Few Good Men, The Rookie, Candyman, Apollo 13, Leaving Las Vegas, Gattaca, The Rock, Air Force One, Sid and Nancy, Amistad, Shanghai Noon, Barb Wire and Timecode. He appeared in the television film L.A. Takedown in 1989 and its 1995 acclaimed theatrical remake Heat, directed by Michael Mann. Several of his earlier roles were in films directed by Alex Cox.

In 2001, Berkeley became a recurring guest star (and later a series regular) on 24 in the role of George Mason, the head of the counter-terrorist unit. He portrayed the mysterious John Smith on the CBS drama Jericho.

In 2010, he received one of his best-known roles, Percy Rose on The CW action-thriller series Nikita. He portrayed the character as a series regular and de facto main antagonist of its first two seasons. He also played Sheriff Thomas McAllister on The Mentalist.

Berkeley portrayed Gregory on AMC's The Walking Dead as a guest star in season six and a series regular in seasons seven and eight, with one additional appearance in the season nine premiere.

In 2018, he portrayed Peter Lockwood, the father of Sam Lockwood on the fourth season of Supergirl.

In 2023, he made a guest appearance as Captain Pellaeon in the third season of The Mandalorian, a role he reprised a year later for the animated Tales of the Empire.

Voice acting Berkeley provides voice-work and voice-over for several animated series, such as Aaahh!!! Real Monsters, Gargoyles and Teen Titans. He also voiced Quentin Beck / Mysterio on The Spectacular Spider-Man, Captain Atom in Superman/Batman: Public Enemies and Dr. Kirk Langstrom in Son of Batman.

Awards In 2013, Berkeley won the Streamy Award in the category of Best Male Performance: Drama for his starring role in the acclaimed web series The Booth at the End.

Personal life Berkeley is also an accomplished make-up artist, painter, and sculptor. Berkeley met actress Sarah Clarke on the set of 24 in 2001 and married her the following year.

Filmography Film Year Title Role Notes 1981 Mommie Dearest Christopher Crawford (Adult) 1982 Tag: The Assassination Game Connally 1985 Volunteers Kent Sutcliffe 1986 Sid and Nancy "Bowery Snax" 1987 Straight to Hell Preacher McMahon Walker Byron Cole 1988 Tapeheads Ricky Fell Deadly Dreams Jack Thorne 1989 The Fabulous Baker Boys Lloyd 1990 Internal Affairs Rudy Mohr The Last of the Finest Eddie "Fast Eddie" The Guardian Detective Short Time Carl Stark The Grifters Lieutenant Pierson The Rookie Ken Blackwell 1991 Terminator 2: Judgment Day Todd Voight Billy Bathgate Harvey Preston For the Boys Roberts 1992 The Gun in Betty Lou's Handbag Mr. Marchat Candyman Trevor Lyle A Few Good Men Captain Whitaker 1994 Caroline at Midnight Joey Szabo 1995 Safe Greg White Apollo 13 Henry Hurt Leaving Las Vegas Cynical Cabbie Heat Ralph 1996 Poison Ivy II: Lily Donald Falk A Family Thing Sunburned Man Barb Wire Chief Alexander Willis The Rock Dr. Lonner Uncredited Driven J.D. Johnson Bulletproof FBI Agent Darryl Gentry 1997 The Killing Jar Danny "Figaretto" Evans Air Force One Secret Service Agent Gibbs One Night Stand Charlie's Friend Gattaca Dr. Lamar Amistad Hammond The Truth About Juliet George 1998 Phoenix Lieutenant Clyde Webber 1999 Universal Soldier: The Return Dr. Dylan Cotner The Cherry Orchard Epihodov 2000 Timecode Evan Wantz Shanghai Noon Marshal Van Cleef 2001 Storytelling Mr. DeMarco Segment: "Non-Fiction" China: The Panda Adventure Dakar Johnston The Man from Elysian Fields Virgil Koster 2003 Quicksand Joey Patterson 2004 Human Error Hanrahan In Enemy Hands Admiral Kentz 2005 Drop Dead Sexy Harkness Deepwater Gus Standing Still Jonathan North Country Arlen Pavich 2006 The Garage "Doc" Ruppert Seraphim Falls Railcrew Foreman 2007 Fracture Judge Moran 2008 Taken Stuart St. John Cook County "Sonny" 2009 Women in Trouble Mr. Frost Year One The King Repo Chick Aldrich De La Chasse Superman/Batman: Public Enemies Captain Atom Voice, direct-to-video A green check mark indicates that a role has been confirmed using a screenshot (or collage of screenshots) of a title's list of voice actors and their respective characters found in its credits or other reliable sources of information. 2010 Kick-Ass Detective Vic Gigante Bedrooms Harry Faster Sergeant Mallory The Death of Socrates Socrates Luster Detective Carter 2011 Girl Walks into a Bar Moe Seeking Justice Lieutenant Durgan 2012 That Guy... Who Was in That Thing Himself Documentary film 2013 Louder Than Words Dr. Lansen Live at the Foxes Den Kenneth Whitman 2014 Transcendence Dr. Thomas Casey Small Time Chick 24: Solitary The Handler Voice; short film Son of Batman Dr. Kirk Langstrom Voice, direct-to-video This Last Lonely Place Frank Devore Pony Uncle Jeff Short film 2015 Solace Mr. Ellis 2016 Allegiant Phillip Moments of Clarity Artemis 2017 Shot Dr. Roberts 2018 Proud Mary Uncle The Maestro Mario Castelnuovo-Tedesco City of Lies Edwards 2019 The Wall of Mexico Michael Rand Dark Harbor Priest James 2020 The Dark and the Wicked Father Thorne 2022 Butcher's Crossing Charlie Hoge Lockdown Joel Also known as The Audition 2024 Reagan George Shultz 2025 No Address Harris 2026 Recluse TBA Post-production TBA A Great Depression TBA Post-production

Television