The Incredible Mr. Limpet (1964)
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)