character - The Mysterons / Colonel White / Captain Black (voice)

character - Captain White / Captain Black / The Mysterons (voice)

character - Colonel White / Captain Black / The Mysterons (voice)

character - The Mysterons / Colonel White / Captain Black (voice)

character - Polly's Husband (uncredited)

character - Inspector Wills

character - Extra (uncredited)

character - Captain Ross

character - Headmaster

character - Col. George Gordon

character - Robert Maitland

character - TV Program Announcer (uncredited)

character - Paul Merton

character - Jimmy Thompson

character - William Peck

character - Stukely

character - Peter Burroughs

character - Ted Fleming

character - James Martin

character - Albert de Courcey

character - Young Yacht Guest (uncredited)

character - Don (as Eldred Tidbury)