The Incredible Mr. Limpet

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.

• 
  Arthur Lubin
• 
  Sergei Petschnikoff
• 
  Ira Stewart
• 
  Edmond F. Bernoudy

• 
  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)