Robert Hammond Patrick is an American actor best known for portraying intense antagonists and authority figures. He broke out in 1991 with his iconic performance as the T-1000 in James Cameron’s Terminator 2: Judgment Day, where his cold, physical presence turned the character into one of cinema’s most enduring villains.
Following Terminator 2, Patrick became a fixture across film and television, with notable roles in Fire in the Sky (1993), Last Action Hero (1993), The Faculty (1998), Walk the Line (2005), and Bridge to Terabithia (2007), as well as The X-Files (2000–2002), where he portrayed FBI Special Agent John Doggett. He later led the military drama The Unit (2006–2009) as Colonel Tom Ryan, the commanding officer overseeing an elite covert operations team, grounding the series with a disciplined, authoritative presence rooted in military realism. He also appeared in Scorpion (2014–2018), where he played Cabe Gallo, the former federal agent who recruits and oversees the show’s team of geniuses.
Patrick also appeared in Peacemaker in 2022, a DC Comics–based series created by James Gunn, portraying Auggie Smith, a radical, authoritarian figure tied to Peacemaker’s past and ideology, a role that highlighted a darker and more unsettling side of his screen persona.
Outside of acting, Patrick is a longtime supporter of the U.S. military and the USO, a commitment shaped by his family history. The grandson of an Army veteran who served in World Wars I and II and the Korean War, he has participated in multiple USO tours since 2008, traveling to seven countries and regularly visiting military hospitals. He is also a dedicated Harley-Davidson enthusiast and co-owner of Harley-Davidson of Santa Clarita, and lives in Los Angeles with his wife, Barbara, and their two children.
as Dallas Cambridge
as Main Power Broker
as Ron Bocca
as Self(1 ep)
as Sitter 13
as Self
as Colonel Hart
as Dwayne
as Fatherinlawus (voice)(1 ep)
as Dr. Cain
as Agent Gubbins (voice)(1 ep)
as Hawkins(3 eps)
as Sheriff McDowell(11 eps)
as Jeremiah Dunmire(10 eps)
as Self - Actor (archive footage)(1 ep)
as Shane Langston(8 eps)
as August 'Auggie' Smith / White Dragon(8 eps)
as August 'Auggie' Smith / Blue Dragon(8 eps)
as Jim O'Brien
as Billy Boy
as Roger Depue
as Josiah Graham
as Sterling French
as Samuel Baker
as Herman Baggerly(7 eps)
as Self(1 ep)
as Chief Mansour
as Zakhar Berkut
as Senator Jackson
as Captain Paris
as Chief Walsh
as Harvey
as Tony
as Self (archival footage)
as Les Packer(2 eps)
as Jack Pryor
as Reverend Eliakim Phelps(1 ep)
as Gary Tison
as Doctor H.H. Greiss
as Giuseppe
as Coach (Billy's Father)(4 eps)
as Ian Cain(1 ep)
as Self(1 ep)
as Narrator
as Self - Presenter
as Cabe Gallo
as Corman
as Studio Guard #1
as Ashton
as Robert
as Ronny Quail
as Cabe Gallo(93 eps)
as Mr. C.
as Doug Kampenfelt
as Jacob Fuller(10 eps)
as Harry Elliot
as John J. Boreman
as Jimbo Caldwell
as Skiptracer
as Max Kennard
as Master Chief Joseph Prosser(13 eps)
as Vince
as Daniel Kiefe
as Self - Guest Judge(1 ep)
as Alec
as Self (archive footage)
as Luke Cain
as Walter Hatch
as Chris
as Detective Jules Dupree
as Warden Dean
as Mays / Mays' Brother(1 ep)
as Mays 1 (Archive Footage) (uncredited)(1 ep)
as Becker
as Nicholas Breakey
as Todd Nixon
as Waldron(1 ep)
as Vernon
as Mr. Aaron
as Jackson Herveaux(12 eps)
as Les Packer(2 eps)
as Dr. David Benway
as Louie (voice)
as Gus Hayden
as Col. James Keller(1 ep)
as Sgt. Pete Daytona
as John Barrett(2 eps)
as Jack Aarons
as Rick Tolley (uncredited)
as Colonel Chandler Johnson
as Rome
as Major General Felts(1 ep)
as Bud Maybury(2 eps)
as Tom Ryan(69 eps)
as Gary Mitchell
as Self
as Phil (voice)(1 ep)
as Ray Cash
as Earl Cole
as Self - Restaurant Patron(1 ep)
as Vernon Presley(2 eps)
as Master Piandao (voice)(2 eps)
as Mindhunter (voice)(1 ep)
as Lenny Richter
as Hibbs(1 ep)
as Hawkman (voice)(2 eps)
as Colonel Marshall Sumner(3 eps)
as Himself
as Colonel Tom Ryanmy 'Bells' Bellavita
as Merton Bell(1 ep)
as Ray Carter
as Nicholas Jenks
as Sam Brown
as FBI Agent
as Det. Russell Stark
as Ray Bennett
as Noah
as Sgt. John Armstrong
as FBI Agent(1 ep)
as Mr. Lisp
as Cole
as Ambassador Mills
as James Wheeler
as Detective
as Ray Schenkel(1 ep)
as Richard Armacost (voice)(1 ep)
as David Scatino(3 eps)
as Zach
as Coach Willis
as Jake McInroy
as Leo Benita
as Shannon Herrold
as Colonel Lee Banning
as Sgt. Daniel Ryan
as Goatee
as John Wesley Hardin (voice)(2 eps)
as Jack Rucker
as Nicholas Tordone
as Lover
as Colonel Tom Ryan McHenry
as LeBeau (voice)(1 ep)
as Race Bannon (voice)(26 eps)
as Darrell Grant
as T-1000
as Travis
as Cop (voice)(1 ep)
as Bee Guard (voice)(1 ep)
as Leslie Chase
as Delbert Radley
as Major John Skokes(2 eps)
as Tough Guy (uncredited)
as Reginald Cameron
as Kongo Shuko
as Jeff Douglas
as Jarvis Scott
as Mickey Dane
as Dr. Greenbox (voice)(1 ep)
as John Doggett(41 eps)
as T-1000
as Mike Rodgers
as Self
as Bad Cop / T-1000
as T-1000
as O'Reilly
as Lothar(1 ep)
as Cameraman
as Slade
as Johnny Ransom
as Deke
as Johnny Ransom