Don McCorkindale

as Professor (voice)

as Narrator

as Tongue Giant

as Ralph

as Albert Carter

as Frank Twigg (1 episode)

as Pennington (1 episode)

as Windigate (1 episode)

as Windigate (1 episode)

as Mr. Forbes (40 episodes)

as Radio Operator

as Gringo

as Tubby

as Third Recruit

as Tubby

as Jonny Williams