character - Ur-So

character - Osterhaus

character - (archive footage)

character - Plainclothesman

character - Patient

character - Ursus

character - Maciste

character - Ursus

character - Ursus

character - Ivan

character - Glauco

character - Himself

character - Gahbo

character - Sailor / Seabee

character - Cowboy in Saloon (uncredited)

character - Whitey

character - Man with Tennis Racket at Accident Scene (uncredited)

character - Roddy (Uncredited)

character - Contestant

character - Interne (uncredited)

character - Olympic Team Member (uncredited)

character - Hercules (uncredited)

character - Tennis Player at Island Chateau