Henry Limpet
Don Knotts
Bessie Limpet
Carole Cook
Lieutenant (uncredited)
Peter Adams
Officer at Fleet Admiral's Meeting (uncredited)
Leon Alton
Short Fisherman (uncredited)
Phil Arnold
Nazi Officer (uncredited)
George Bruggeman
Sonar Man (uncredited)
Paul Busch
Sailor (uncredited)
Al Checco
Giggling Girl (uncredited)
Cordy Clark
Roydon Clark
Passerby/Naval Officer at Meeting (uncredited)
Sayre Dearing
George DeNormand
George Stickel
Jack Weston
Naval Officer at Meeting (uncredited)
Dan Dowling
U-Boat Captain (uncredited)
Harold Dyrenforth
Louie Elias
Miss Barnes (uncredited)
Lisabeth Field
Logan Field
Fred Fisher
Walter Friedel
Naval Officer at Fleet Admiral Meeting (uncredited)
George Golden
Marv Goux
John Hale
Harlock
Andrew Duggan
Officer at Fleet Admiral's Briefing (uncredited)
Sam Harris
Scientist (uncredited)
George Holmes
Joseph La Cava
Mike Lally
Harold Miller
Boat Captain (uncredited)
Charles Morton
Henry Norell
Sport Fishmern (uncredited)
Jack Pepper
Helmsman (uncredited)
Montie Plyler
Submarine Captain (uncredited)
Felix Reinsch
Admiral P.P. Spewter
Larry Keating
Passerby (uncredited)
Waclaw Rekwart
Heinz Sadler
Old Man in Shipping Office (uncredited)
Scott Seaton
Jack Shea
Policeman (uncredited)
John Truax
Edward Wermel
Feridun Çölgeçen
Nazi Admiral (as Oscar Beregi)
Oscar Beregi Jr.
Fleet Admiral
Charles Meredith
Ladyfish (voice)
Elizabeth MacRae
Crusty (voice)
Paul Frees
Man Staring Into Window (uncredited)
Wesley Gale
Animation Director
Gerry Chiniquy
Director
Arthur Lubin
Hawley Pratt
Robert McKimson
Screenplay
Jameson Brewer
Adaptation
Joe DiMona
John C. Rose
Novel
Theodore Pratt
Bill Tytla
Editor
Donald Tait
Makeup Artist
Bill Phillips
Assistant Director
Sergei Petschnikoff
Ira Stewart
Hairstylist
Jean Burt Reilly
Lenore Weaver
Director of Photography
Harold E. Stine
Sound
Stanley Jones
Set Decoration
William L. Kuehl
Producer
Louis Phillips
Edmond F. Bernoudy
Story Supervisor
John W. Dunn
Art Direction
LeRoy Deane
Makeup Supervisor
Gordon Bau
Music
Frank Perkins
Gaffer
Paul Burnett