Captain Maddox (1 episode, 1998)
Wade Peterson (1 episode, 1993)
Dr. Sean Morrissey (unknown episodes, 1988)
Ed Wight (2 episodes, 1980)
Mark Henderson (unknown episodes, 1975-1976)
Jeffrey Taylor (1990) / ... (unknown episodes, 1991)
Billy Tabor / ... (2 episodes, 1966)
Dr. Gary Lansing (unknown episodes, 1977-1979)
Bud McLister / ... (5 episodes, 1966-1969)
Paul Lee Weaver (2 episodes, 1966)