David Schramm

as Herb

as W.W. Denslow

as Roy Biggins (172 episodes)

as Joe McGill (3 episodes)

as Executive #3

as Captain Farraday (1 episode), as Captain Faraday (1 episode)

as Vic Dumask

as Lufkin

as Self / General D.

as Joe (1 episode)

as Mr. Mister

as Professor Eric Haliwell (1 episode)

as Kit Carson