Richard Long

as Jerry Carter

as Michael Green

as Herman Munster

as Ernie Paine (9 episodes)

as Harold Everett (54 episodes)

as Richard Atkins (2 episodes)

as Paul Durand

as Jarrod Barkley (112 episodes), Director

as V. Bartley 'Bart' Lanigan

as Paul Durand (3 episodes)

as Maj. Ben Dawson (1 episode)

as Pete

as Eddie Breech (1 episode)

as Dick Farrington (1 episode)

as Rex Randolph (1 episode)

as Rex Randolph (39 episodes)

as David Andrew Gurney (1 episode), as Uncle Rick / Dr. Rex / Professor Sigmund Friend / Tom / #17 (1 episode)

as Robert Douglas

as Lance Schroeder

as Rex Randolph (1 episode), as Dick Lynwood (1 episode), as Tony Wendice (1 episode)