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