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.
1999 • TV
2003 • TV
2004 • TV
1993 • TV
1991 • Movie
1990 • Movie
as T-1000
as O'Reilly
as Gus Hayden
as Daniel Kiefe
as Jack Aarons
as Kongo Shuko
as Jake McInroy
as Sgt. John Armstrong
as Darrell Grant
as Ray Carter
as Max Kennard
as Alec
as John J. Boreman
as Johnny Ransom
as Louie (voice)
as Skiptracer
as Mr. Lisp
as Bad Cop / T-1000
as Ray Cash
Executive Producer
Producer
Producer
Executive Producer
as Ray Schenkel
1 episodes
as Merton Bell
1 episodes
as Hibbs
1 episodes
as John Doggett
41 episodes
as Mays / Mays' Brother
1 episodes
as Mays 1 (Archive Footage) (uncredited)
1 episodes
as Mindhunter (voice)
1 episodes
as David Scatino
3 episodes
as Shane Langston
8 episodes
as Les Packer
2 episodes
as Coach (Billy's Father)
4 episodes
as Major General Felts
1 episodes
as Cabe Gallo
93 episodes
as Colonel Marshall Sumner
3 episodes
as Jackson Herveaux
12 episodes
as Self - Restaurant Patron
1 episodes
as Col. James Keller
1 episodes
as Waldron
1 episodes
as Ian Cain
1 episodes
as August 'Auggie' Smith / White Dragon
8 episodes
