- Stargate SG-1 …. Colonel Jack O’Neill / … (175 episodes, 1997-2007)
- Stargate: Atlantis …. Major General Jack O’Neill / … (4 episodes, 2004-2006)
- Firehouse (1997) (TV) …. Lt. Michael Brooks
- Fallout: A Post-Nuclear Role-Playing Game (1997) (VG) (voice) …. Mayor Killian Darkwater
- Pandora’s Clock (1996) (TV) …. Capt. James Holland
- Legend …. Ernest Pratt / … (12 episodes, 1995)
- Past the Bleachers (1995) (TV) …. Bill Parish
- MacGyver: Trail to Doomsday (1994) (TV) …. Angus MacGyver
- Beyond Betrayal (1994) (TV) …. Bradley Matthews
- MacGyver: Lost Treasure of Atlantis (1994) (TV) …. Angus MacGyver
- Through the Eyes of a Killer (1992) (TV) …. Ray Bellano
- MacGyver …. MacGyver (139 episodes, 1985-1992)
- In the Eyes of a Stranger (1992) (TV) …. Jack Rourke
- The Tonight Show Starring Johnny Carson (1 episode, 1991)
- Odd Jobs (1986) …. Spud
- Ordinary Heroes (1986) …. Tony Kaiser
- Emerald Point N.A.S. …. Navy Lt. Simon Adams (22 episodes, 1983-1984)
- Seven Brides for Seven Brothers …. Adam McFadden (21 episodes, 1982-1983)
- Young Doctors in Love (1982) (uncredited) …. Drug Dealer
- The Love Boat …. Carter Randall (1 episode, 1982)
- Today’s F.B.I. …. Andy McFey (1 episode, 1981)
- The Facts of Life …. Brian Parker (1 episode, 1981)
- General Hospital (1963) TV series …. Dr. Jeff Webber (unknown episodes, 1976-1981)

