Benjamin Rand (2 episodes, 2007)
Branson Rose (1 episode, 2006)
District Attorney Richard Caldwell (1 episode, 2005)
President Emerson (2 episodes, 2003)
Dr. Bernard Chenowith (6 episodes, 2001-2003)
Mason (в титрах отсутствует)
Professor Emil Hamilton (6 episodes, 2004-2005)
Administrator V'Las (3 episodes, 2004)
Dr. Ezra Stowe (2 episodes, 2000)
Charlie Davenport (1 episode, 2005)
Senator George Montgomery (1 episode, 2005)
Dr. Ben Hadley / ... (2 episodes, 2000-2005)
Roger T. 'Race' Bannon / ... (14 episodes, 1996-1997)
President Charles Halsey (1 episode, 1996)
General William Hague (2 episodes, 1994-1995)
Admiral Leyton (2 episodes, 1996)
Hal Lanford (unknown episodes)
Dr. Frederick Barrett / ... (2 episodes, 1997-2003)
Chase Gioberti (155 episodes, 1981-1987)
Psychiatrist (в титрах отсутствует)
Dennis Hailey / ... (2 episodes, 1972-1973)
Frank Brailie (1 episode, 1989)
Greg Davidson / ... (3 episodes, 1972-1974)