The Incredible Mr. Limpet

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)

Jameson Brewer

Screenplay

John C. Rose

Screenplay, Producer

Arthur Lubin

Director

Harold E. Stine

Director of Photography

Donald Tait

Editor