Thomas Callaway

as Jim Hopkins

as Eric Nile (1 episode)

as Professor Donald

as T. Barry Armstrong

as Texas Joe Grant

as Col. James W. Fannin

as Animal (1 episode)

as Orin Baldwin (1 episode)

as Bob Forehead (12 episodes)

as Klaus (1 episode)

as Sam Bryce (1 episode)

as Mr. Kramer (1 episode)

as Fitzgerald (1 episode)

as Gary Wallace (1 episode)

as Lou Sackler (1 episode)

as Jack Turner (1 episode)

as Dr. Otto Foster (10 episodes)

as Steel (1 episode)

as Harold (1 episode)

as Cpt. Sweeney (1 episode)