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.
| Movie | Hounds of War | Colonel Hart | 2024-08-29 |
| Movie | Dark Asset | Dr. Cain | 2023-09-22 |
| Movie | What Josiah Saw | Josiah Graham | 2021-08-13 |
| Movie | No Man of God | Roger Depue | 2021-08-19 |
| Movie | Rushed | Jim O'Brien | 2021-08-27 |
| Movie | The Protégé | Billy Boy | 2021-08-19 |
| Movie | Troubled Waters | Sterling French | 2020-10-01 |
| Movie | A Place Among the Dead | RP | 2020-11-09 |
| Movie | Tone-Deaf | Harvey | 2019-03-10 |
| Movie | The Poison Rose | Chief Walsh | 2019-05-23 |
| Movie | Back Roads | Chief Mansour | 2019-11-15 |
| Movie | The Rising Hawk | Zakhar Berkut | 2019-10-10 |
| Movie | Edge of Fear | Jack Pryor | 2018-08-01 |
| Movie | Last Rampage | Gary Tison | 2017-09-22 |
| Series | Lore | Reverend Eliakim Phelps | 2017-10-13 |
| Series | MacGyver | Ian Cain | 2016-09-23 |
| Series | Goliath | Coach (Billy's Father) | 2016-10-13 |
| Movie | Street Level | Giuseppe | 2016-11-08 |
| Movie | Eloise | Doctor H.H. Greiss | 2016-12-30 |
| Movie | Sinatra 100: An All-Star Grammy Concert | Self - Presenter | 2015-12-06 |
| Movie | Hollywood Adventures | Studio Guard #1 | 2015-06-26 |
| Movie | Hellions | Corman | 2015-09-25 |
| Movie | Holbrook/Twain: An American Odyssey | Self | 2014-06-15 |
| Movie | Ask Me Anything | Doug Kampenfelt | 2014-04-19 |
| Movie | Lost After Dark | Mr. C. | 2014-09-19 |
| Movie | Endless Love | Harry Elliot | 2014-02-12 |
| Series | From Dusk Till Dawn: The Series | Jacob Fuller | 2014-03-11 |
| Movie | Kill the Messenger | Ronny Quail | 2014-10-09 |
| Movie | Lennon or McCartney | Self (archive footage) | 2014-12-12 |
| Movie | Tell | Ashton | 2014-12-04 |
| Movie | The Road Within | Robert | 2014-10-24 |
| Series | Scorpion | Cabe Gallo | 2014-09-22 |
| Movie | Gangster Squad | Max Kennard | 2013-01-09 |
| Movie | Identity Thief | Skiptracer | 2013-02-07 |
| Movie | Lovelace | John J. Boreman | 2013-08-08 |
| Movie | Jayne Mansfield's Car | Jimbo Caldwell | 2013-07-25 |
| Movie | Safe House | Daniel Kiefe | 2012-02-08 |
| Movie | Trouble with the Curve | Vince | 2012-09-21 |
| Series | Last Resort | Master Chief Joseph Prosser | 2012-09-27 |
| Movie | Mafia | Detective Jules Dupree | 2011-01-01 |
| Movie | Good Day for It | Luke Cain | 2011-04-08 |
| Movie | S.W.A.T.: Firefight | Walter Hatch | 2011-03-01 |
| Movie | Red Faction: Origins | Alec | 2011-06-04 |
| Movie | The John Cena Experience | Self (archive footage) | 2011-06-04 |
| Movie | Edgar Floats | Nicholas Breakey | 2010-01-01 |
| Movie | Five Minarets in New York | Becker | 2010-03-09 |
| Movie | The Black Waters of Echo's Pond | Pete | 2010-04-09 |
| Movie | The Wrath of Cain | Warden Dean | 2010-11-16 |
| Movie | Kill Speed | Unknown | 2010-07-02 |
| Movie | Lonely Street | Mr. Aaron | 2009-01-01 |
| Movie | Alien Trespass | Vernon | 2009-04-03 |
| Movie | Starz Inside - Unforgettably Evil | Self | 2009-07-26 |
| Movie | The Men Who Stare at Goats | Todd Nixon | 2009-10-17 |
| Series | Community | Waldron | 2009-09-17 |
| Movie | Strange Wilderness | Gus Hayden | 2008-02-01 |
| Movie | Fly Me to the Moon | Louie (voice) | 2008-08-15 |
| Movie | Autopsy | Dr. David Benway | 2008-08-24 |
| Series | Sons of Anarchy | Les Packer | 2008-09-03 |
| Series | Burn Notice | John Barrett | 2007-06-28 |
| Movie | Bridge to Terabithia | Jack Aarons | 2007-02-15 |
| Movie | Balls of Fury | Sgt. Pete Daytona | 2007-08-29 |
| Movie | Firewall | Gary Mitchell | 2006-02-08 |
| Series | The Unit | Tom Ryan | 2006-03-07 |
| Series | Big Love | Bud Maybury | 2006-03-12 |
| Movie | Flags of Our Fathers | Colonel Chandler Johnson | 2006-10-19 |
| Movie | The Marine | Rome | 2006-10-13 |
| Series | Psych | Major General Felts | 2006-07-07 |
| Series | American Dad! | Mindhunter (voice) | 2005-02-06 |
| Series | Elvis | Vernon Presley | 2005-05-08 |
| Movie | Walk the Line | Ray Cash | 2005-09-13 |
| Movie | Supercross | Earl Cole | 2005-08-16 |
| Series | Ben 10 | Phil (voice) | 2005-12-27 |
| Movie | Bad Apple | Colonel Tom Ryanmy 'Bells' Bellavita | 2004-02-16 |
| Series | Stargate Atlantis | Colonel Marshall Sumner | 2004-07-15 |
| Series | Lost | Hibbs | 2004-09-22 |
| Movie | Ladder 49 | Lenny Richter | 2004-10-01 |
| Movie | First to Die | Nicholas Jenks | 2003-02-23 |
| Movie | Charlie's Angels: Full Throttle | Ray Carter | 2003-06-25 |
| Series | Duck Dodgers | Unknown | 2003-08-23 |
| Series | NCIS | Merton Bell | 2003-09-23 |
| Movie | Backflash | Ray Bennett | 2002-01-22 |
| Movie | D-Tox | Noah | 2002-01-04 |
| Movie | Angels Don't Sleep Here | Det. Russell Stark | 2002-04-02 |
| Movie | The X Files: The Truth | John Doggett | 2002-05-19 |
| Movie | Pavement | Sam Brown | 2002-12-13 |
| Movie | Ticker | FBI Agent | 2002-11-12 |
| Movie | Spy Kids | Mr. Lisp | 2001-03-18 |
| Movie | The X-Files : Existence | John Doggett | 2001-05-20 |
| Movie | Texas Rangers | Sgt. John Armstrong | 2001-11-30 |
| Movie | The Vivero Letter | James Wheeler | 2000-10-28 |
| Movie | Mexico City | Ambassador Mills | 2000-11-01 |
| Movie | All the Pretty Horses | Cole | 2000-12-11 |
| Series | Batman Beyond | Richard Armacost (voice) | 1999-01-10 |
| Series | The Sopranos | David Scatino | 1999-01-10 |
| Movie | A Texas Funeral | Zach | 1999-01-01 |
| Movie | From Dusk Till Dawn 2: Texas Blood Money | Buck | 1999-03-16 |
| Movie | From Star Wars to Star Wars: The Story of Industrial Light & Magic | Self | 1999-06-15 |
| Movie | Tactical Assault | Colonel Lee Banning | 1998-04-07 |
| Movie | Rag and Bone | Sgt. Daniel Ryan | 1998-01-01 |
| Movie | Ambushed | Shannon Herrold | 1998-06-20 |
| Movie | Perfect Assassins | Leo Benita | 1998-11-13 |
| Movie | The Faculty | Coach Joe Willis | 1998-12-25 |
| Movie | Renegade Force | Jake McInroy | 1998-12-14 |
| Movie | Rosewood | Lover | 1997-02-21 |
| Series | The Angry Beavers | Unknown | 1997-04-19 |
| Movie | The Only Thrill | Colonel Tom Ryan McHenry | 1997-01-04 |
| Movie | Sink Or Swim | Goatee | 1997-09-19 |
| Movie | Asylum | Nicholas Tordone | 1997-05-09 |
| Movie | Cop Land | Jack Rucker | 1997-08-15 |
| Movie | T2 3-D: Battle Across Time | T-1000 | 1996-01-01 |
| Movie | T2 3-D: Pre-Show | T-1000 (archive footage) | 1996-04-27 |
| Movie | Striptease | Darrell Grant | 1996-06-28 |
| Series | Superman: The Animated Series | LeBeau (voice) | 1996-09-06 |
| Series | The Real Adventures of Jonny Quest | Race Bannon (voice) | 1996-08-26 |
| Series | The Outer Limits | Major John Skokes | 1995-03-26 |
| Movie | Body Language | Delbert Radley | 1995-07-22 |
| Movie | Last Gasp | Leslie Chase | 1995-08-30 |
| Movie | Decoy | Travis | 1995-12-19 |
| Movie | Body Shot | Mickey Dane | 1994-03-09 |
| Movie | Zero Tolerance | Jeff Douglas | 1994-06-09 |
| Movie | Hong Kong 97 | Reginald Cameron | 1994-11-09 |
| Movie | Double Dragon | Kongo Shuko | 1994-11-04 |
| Series | Raw | Unknown | 1993-01-11 |
| Movie | Fire in the Sky | Mike Rodgers | 1993-03-12 |
| Series | The X-Files | John Doggett | 1993-09-10 |
| Movie | Last Action Hero | T-1000 | 1993-06-18 |
| Movie | Terminator 2: Judgment Day | T-1000 | 1991-07-03 |
| Movie | Hollywood Boulevard II | Cameraman | 1991-01-30 |
| Movie | The Making of 'Terminator 2: Judgment Day' | Self | 1991-09-10 |
| Movie | Die Hard 2 | O'Reilly | 1990-07-03 |
| Movie | Resident Alien | Playwright | 1990-09-14 |
| Series | Tales from the Crypt | Lothar | 1989-06-10 |
| Series | The New Lassie | Unknown | 1989-09-08 |
| Movie | Equalizer 2000 | Deke | 1988-01-04 |
| Movie | Killer Instinct | Johnny Ransom | 1988-05-01 |
| Movie | Eye of the Eagle | Johnny Ransom | 1987-01-01 |
| Movie | Future Hunters | Slade | 1986-01-01 |
| Movie | Tonka | Cavalryman (uncredited) | 1958-12-25 |
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