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Biography
Thomas Patrick O'Brien has been an American actor since the age of seventeen, having first trained at the American Conservatory Theater in San Francisco, where he appeared in ACT's mainstage productions of The Holdup; and A Midsummer Night's Dream as Puck, opposite Annette Bening.
Source: Wikipedia · CC BY-SA
Filmography25 titles
The X-Files
1993as Sgt. Louis Frisch
1993as Sgt. Louis Frisch
Supernatural
2005as Clark Adams
2005as Clark Adams
Stargate SG-1
1997as Brian Vogler
1997as Brian Vogler
Smallville
2001as Roger Nixon
2001as Roger Nixon
Charmed
1998as Zile
1998as Zile
CSI: Crime Scene Investigation
2000as Max Duncan
2000as Max Duncan
Moonlighting
1985as Inmate
1985as Inmate
Murder, She Wrote
1984as Jason Giles
1984as Jason Giles
The Dead Zone
2002as Dr. Jaeger
2002as Dr. Jaeger
JAG
1995as Captain Cahill
1995as Captain Cahill
21 Jump Street
1987as Jake Whitaker / Danny Jacobson
1987as Jake Whitaker / Danny Jacobson
The Accused
1988as Larry
1988as Larry
L.A. Law
1986as Justin Pregerson
1986as Justin Pregerson
Bones and All
2022as Mr. Harmon (uncredited)
2022as Mr. Harmon (uncredited)
Flashback
1990as Phil Prager
1990as Phil Prager
The Big Easy
1986as Bobby McSwain
1986as Bobby McSwain
Crash Landing: The Rescue of Flight 232
1992as Chris Porter
1992as Chris Porter
The Astronaut's Wife
1999as Allen Dodge
1999as Allen Dodge
McVeigh
2024as Gun Show Vendor
2024as Gun Show Vendor
The Perfect Husband: The Laci Peterson Story
2004as Det. Frank Ross
2004as Det. Frank Ross
Physical Evidence
1989as Matthew "Matt" Farley
1989as Matthew "Matt" Farley
Alien Incursion
2006as Stucker
2006as Stucker
Facade
1999as Bob Kelner
1999as Bob Kelner
Alan and the Rulers of the Air
2023as Greg
2023as Greg
Love and Lies
1990as Tom
1990as Tom