Don Knotts
饰 Henry Limpet
Carole Cook
饰 Bessie Limpet
Larry Keating
饰 Admiral P.P. Spewter
Oscar Beregi Jr.
饰 Nazi Admiral (as Oscar Beregi)
Charles Meredith
饰 Fleet Admiral
Elizabeth MacRae
饰 Ladyfish (voice)
Wesley Gale
饰 Man Staring Into Window (uncredited)
Leon Alton
饰 Officer at Fleet Admiral's Meeting (uncredited)
Phil Arnold
饰 Short Fisherman (uncredited)
George Bruggeman
饰 Nazi Officer (uncredited)
Paul Busch
饰 Sonar Man (uncredited)
Al Checco
饰 Sailor (uncredited)
Cordy Clark
饰 Giggling Girl (uncredited)
Roydon Clark
饰 Sailor (uncredited)
Sayre Dearing
饰 Passerby/Naval Officer at Meeting (uncredited)
George DeNormand
饰 Nazi Officer (uncredited)
Dan Dowling
饰 Naval Officer at Meeting (uncredited)
