The Incredible Mr. Limpet

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)