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 | Hot Bath an' a Stiff Drink 2 | Dallas Cambridge | 2027 |
| Movie | Diamond | Unknown | 2027 |
| Movie | Mermaid | Ron Bocca | 2025-03-08 |
| Movie | FEEL | Sitter 13 | 2025-05-16 |
| Movie | Arnold & Sly: Rivals, Friends, Icons | Self (archive footage) (uncredited) | 2024-04-23 |
| Movie | Chuck Zito: An American Story | Self | 2024-05-01 |
| Movie | Good Men | Self | 2024-10-04 |
| Movie | Hounds of War | Colonel Hart | 2024-08-29 |
| Series | The Night Agent | Hawkins | 2023-03-23 |
| Series | Royal Crackers | Agent Gubbins (voice) | 2023-04-02 |
| Movie | Dark Asset | Dr. Cain | 2023-09-22 |
| Series | Krapopolis | Fatherinlawus (voice) | 2023-09-24 |
| Movie | Shelter in Solitude | Dwayne | 2023-10-06 |
| Series | Reacher | Shane Langston | 2022-02-03 |
| Series | Peacemaker | August 'Auggie' Smith / Blue Dragon | 2022-01-13 |
| Series | LIGHT & MAGIC | Self - Actor (archive footage) | 2022-07-27 |
| Series | Tulsa King | Jeremiah Dunmire | 2022-11-13 |
| Movie | Babylon | Self (Archival Footage) | 2022-12-22 |
| Series | 1923 | Sheriff McDowell | 2022-12-18 |
| Movie | What Josiah Saw | Josiah Graham | 2021-08-13 |
| Movie | No Man of God | Roger Depue | 2021-08-19 |
| Movie | The Protégé | Billy Boy | 2021-08-19 |
| Movie | The Tale of Dubious Angel | Leeland Murphy | 2021-10-29 |
| Movie | Rushed | Jim O'Brien | 2021-08-27 |
| Series | Talking Sopranos | Self | 2020-04-07 |
| Series | Perry Mason | Herman Baggerly | 2020-06-21 |
| Movie | Honest Thief | Samuel Baker | 2020-09-03 |
| 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 | SGT. Will Gardner | Tony | 2019-01-11 |
| Movie | The Poison Rose | Chief Walsh | 2019-05-23 |
| Movie | The Laundromat | Captain Paris | 2019-09-27 |
| Movie | The Rising Hawk | Zakhar Berkut | 2019-10-10 |
| Movie | Jarhead: Law of Return | Senator Jackson | 2019-10-01 |
| Movie | Back Roads | Chief Mansour | 2019-11-15 |
| Movie | Edge of Fear | Jack Pryor | 2018-08-01 |
| Series | Mayans M.C. | Les Packer | 2018-09-04 |
| Movie | Last Rampage | Gary Tison | 2017-09-22 |
| Series | Lore | Reverend Eliakim Phelps | 2017-10-13 |
| Movie | T2: Reprogramming The Terminator | Self | 2017-11-23 |
| Series | Ride with Norman Reedus | Self | 2016-06-12 |
| Series | MacGyver | Ian Cain | 2016-09-23 |
| Movie | 21 Days Under the Sky | Narrator | 2016-05-03 |
| Series | Goliath | Coach (Billy's Father) | 2016-10-13 |
| Movie | Eloise | Doctor H.H. Greiss | 2016-12-30 |
| Movie | Street Level | Giuseppe | 2016-11-08 |
| Movie | Hellions | Corman | 2015-09-25 |
| Movie | Hollywood Adventures | Studio Guard #1 | 2015-06-26 |
| Movie | Sinatra 100: An All-Star Grammy Concert | Self - Presenter | 2015-12-06 |
| Movie | Holbrook/Twain: An American Odyssey | Self | 2014-06-15 |
| Series | From Dusk Till Dawn: The Series | Jacob Fuller | 2014-03-11 |
| Movie | Endless Love | Harry Elliot | 2014-02-12 |
| Movie | Lost After Dark | Mr. C. | 2014-09-19 |
| Movie | From Dusk Till Dawn: Making the First Season | Unknown | 2014-03-11 |
| Movie | Ask Me Anything | Doug Kampenfelt | 2014-04-19 |
| Movie | Tell | Ashton | 2014-12-04 |
| Movie | The Road Within | Robert | 2014-10-24 |
| Movie | Kill the Messenger | Ronny Quail | 2014-10-09 |
| Series | Scorpion | Cabe Gallo | 2014-09-22 |
| Movie | Lennon or McCartney | Self (archive footage) | 2014-12-12 |
| Movie | Gangster Squad | Max Kennard | 2013-01-09 |
| Movie | Identity Thief | Skiptracer | 2013-02-07 |
| Movie | Jayne Mansfield's Car | Jimbo Caldwell | 2013-07-25 |
| Movie | Lovelace | John J. Boreman | 2013-08-08 |
| 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 | D-Minus | Chris | 2011-02-01 |
| Movie | S.W.A.T.: Firefight | Walter Hatch | 2011-03-01 |
| Movie | Mafia | Detective Jules Dupree | 2011-01-01 |
| Series | Halloween Wars | Self - Guest Judge | 2011-10-02 |
| Movie | Good Day for It | Luke Cain | 2011-04-08 |
| Movie | Red Faction: Origins | Alec | 2011-06-04 |
| Movie | The John Cena Experience | Self (archive footage) | 2011-06-04 |
| Movie | Five Minarets in New York | Becker | 2010-03-09 |
| Movie | Edgar Floats | Nicholas Breakey | 2010-01-01 |
| Movie | The Black Waters of Echo's Pond | Pete | 2010-04-09 |
| Movie | Kill Speed | Unknown | 2010-07-02 |
| Movie | The Wrath of Cain | Warden Dean | 2010-11-16 |
| Series | The Walking Dead | Mays 1 (Archive Footage) (uncredited) | 2010-10-31 |
| Movie | Alien Trespass | Vernon | 2009-04-03 |
| Movie | Lonely Street | Mr. Aaron | 2009-01-01 |
| Series | Community | Waldron | 2009-09-17 |
| Movie | Starz Inside - Unforgettably Evil | Self | 2009-07-26 |
| Movie | The Men Who Stare at Goats | Todd Nixon | 2009-10-17 |
| Movie | Les petites étrangères | Unknown | 2008-06-09 |
| 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 | True Blood | Jackson Herveaux | 2008-09-07 |
| 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 |
| Series | Chuck | Col. James Keller | 2007-09-24 |
| Series | The Unit | Tom Ryan | 2006-03-07 |
| Movie | Firewall | Gary Mitchell | 2006-02-08 |
| Movie | The Making of 'The Marine' | Self | 2006-01-01 |
| Series | Big Love | Bud Maybury | 2006-03-12 |
| Series | Disorderly Conduct: Video on Patrol | Unknown | 2006-05-27 |
| Movie | The Broken Movie | cop | 2006-12-21 |
| Movie | We Are Marshall | Rick Tolley (uncredited) | 2006-12-12 |
| 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 | Avatar: The Last Airbender | Master Piandao (voice) | 2005-02-21 |
| Series | American Dad! | Mindhunter (voice) | 2005-02-06 |
| Series | Elvis | Vernon Presley | 2005-05-08 |
| Movie | Walk the Line | Ray Cash | 2005-09-13 |
| Series | Hell's Kitchen | Self - Restaurant Patron | 2005-05-30 |
| Series | Ben 10 | Phil (voice) | 2005-12-27 |
| Movie | Supercross | Earl Cole | 2005-08-16 |
| 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 |
| Series | The Batman | Hawkman (voice) | 2004-09-11 |
| 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 | D-Tox | Noah | 2002-01-04 |
| Movie | Angels Don't Sleep Here | Det. Russell Stark | 2002-04-02 |
| Movie | Backflash | Ray Bennett | 2002-01-22 |
| Movie | Pavement | Sam Brown | 2002-12-13 |
| Movie | Ticker | FBI Agent | 2002-11-12 |
| Movie | Spy Kids | Mr. Lisp | 2001-03-18 |
| Movie | Texas Rangers | Sgt. John Armstrong | 2001-11-30 |
| Series | The Hire | FBI Agent | 2001-04-26 |
| Movie | The Making of 'Terminator 2 3D' | Self | 2000-08-29 |
| 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 | The Sopranos | David Scatino | 1999-01-10 |
| Movie | A Texas Funeral | Zach | 1999-01-01 |
| Series | Batman Beyond | Richard Armacost (voice) | 1999-01-10 |
| Movie | From Dusk Till Dawn 2: Texas Blood Money | Buck | 1999-03-16 |
| Movie | Shogun Cop | Detective | 1999-11-01 |
| Series | Law & Order: Special Victims Unit | Ray Schenkel | 1999-09-20 |
| 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 | The Faculty | Coach Joe Willis | 1998-12-25 |
| Movie | Renegade Force | Jake McInroy | 1998-12-14 |
| Movie | Perfect Assassins | Leo Benita | 1998-11-13 |
| Movie | Rosewood | Lover | 1997-02-21 |
| Movie | The Only Thrill | Colonel Tom Ryan McHenry | 1997-01-04 |
| Series | The Angry Beavers | Unknown | 1997-04-19 |
| Movie | Asylum | Nicholas Tordone | 1997-05-09 |
| Movie | Sink Or Swim | Goatee | 1997-09-19 |
| Series | The Legend of Calamity Jane | John Wesley Hardin (voice) | 1997-09-14 |
| Movie | Cop Land | Jack Rucker | 1997-08-15 |
| Movie | T2 3-D: Battle Across Time | T1000 | 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 | Masters of Illusion: The Wizards of Special Effects | Self | 1994-05-22 |
| Movie | Body Shot | Mickey Dane | 1994-03-09 |
| Movie | The Cool Surface | Jarvis Scott | 1994-04-05 |
| 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 |
| Movie | T2: More Than Meets the Eye | Self | 1993-01-01 |
| Series | Raw | Unknown | 1993-01-11 |
| Movie | Last Action Hero | T-1000 | 1993-06-18 |
| Series | The X-Files | John Doggett | 1993-09-10 |
| Movie | Fire in the Sky | Mike Rodgers | 1993-03-12 |
| Movie | Wayne's World | Bad Cop / T-1000 | 1992-02-14 |
| 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 | Peacemaker | August 'Auggie' Smith / White Dragon | 1990-05-14 |
| Movie | Resident Alien | Playwright | 1990-09-14 |
| Movie | Die Hard 2 | O'Reilly | 1990-07-03 |
| Series | Tales from the Crypt | Lothar | 1989-06-10 |
| Series | The New Lassie | Unknown | 1989-09-08 |
| Movie | Killer Instinct | Johnny Ransom | 1988-05-01 |
| Movie | Equalizer 2000 | Deke | 1988-01-04 |
| Movie | Warlords from Hell | Unknown | 1988-07-20 |
| Movie | Eye of the Eagle | Johnny Ransom | 1987-01-01 |
| Movie | Future Hunters | Slade | 1986-01-01 |
| Movie | Tonka | Cavalryman (uncredited) | 1958-12-25 |