Harold Rossiter 1 episode, 2017
Mr. Ryan (2 episodes, 2011)
Bill Wellington (1 episode, 2011)
Hollis Percy (1 episode, 2013)
Mr. Valone (2 episodes, 2003)
Dr. Jonas Zane / ... (4 episodes, 2000-2001)
Gordon Armbrust (2 episodes, 1999)
Nikolas Rokoff (2 episodes, 1997)
Krislov / ... (2 episodes, 1998-1999)
General Krim (2 episodes, 1993)
Ed (3 episodes, 1996-1997)
Alexei Voshin (1 episode, 1992)
Bob Anastas / ... (2 episodes, 1984-1987)
Arthur Wainwright / ... (5 episodes, 1985-1996)
Phil Dugan (2 episodes, 1985)
Major Wiiliam 'Bud' Uanna
Joe Cooper (13 episodes, 1982)
Lt. Col. Yonatan 'Yonni' Netanyahu
Joseph Arrow / ... (2 episodes, 1976)
David Kincaid (1 episode, 1989)
Dr. Elliot Durbin (unknown episodes, 1996)
Trevor Lansing (164 episodes, 2007-2009)