
Milquetoast Henry Limpet experiences his fondest wish and is transformed into a fish. As a talking fish he assists the US Navy in hunting German submarines during World War II.
Cast

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)
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)

Peter Adams
Lieutenant (uncredited)
Crew

Arthur Lubin
Director
Joe DiMona
Adaptation
Jameson Brewer
Screenplay
John C. Rose
Screenplay, Producer
Theodore Pratt
Novel
Donald Tait
Editor
Harold E. Stine
Director of Photography
Sergei Petschnikoff
Assistant Director
Ira Stewart
Assistant Director
Edmond F. Bernoudy
Assistant Director
Bill Tytla
Animation Director

Hawley Pratt
Animation Director
Gerry Chiniquy
Animation Director

Robert McKimson
Animation Director
Jean Burt Reilly
Hairstylist
Lenore Weaver
Hairstylist
Bill Phillips
Makeup Artist
Louis Phillips
Makeup Artist
Gordon Bau
Makeup Supervisor
Stanley Jones
Sound
Frank Perkins
Music
William L. Kuehl
Set Decoration
John W. Dunn
Story Supervisor
Paul Burnett
Gaffer
LeRoy Deane
Art Direction
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