"A fisherman crosses paths with a diamond-smuggling gangster–who is his doppelgänger—and inadvertently takes his place at a resort hotel where he meets a special girl."
Jerry Lewis
as Gerald Clamson
Harold J. Stone
as Thor
Susan Bay Nimoy
as Suzie Cartwright
Buddy Lester
as Studs
Del Moore
as Mr. Hodges
Paul Lambert
as Moxie
Jeannine Riley
as Bambi Berman
Leonard Stone
as Fong
Charlie Callas
as Rex
Frank De Vol
as Bogart
Harland Sanders
as Himself (uncredited)
George Takei
as Diamond Jeweler (uncredited)
Pete Peterson
as Water Skiier (uncredited)
Vern Rowe
as Gunner
David Lipp
as Lizard
Vincent Van Lynn
as Fancher
Mike Mahoney
as Detective #1
Walter Kray
as Detective #2
Eddie Ryder
as Specs
Murray Alper
as Ed - Motorcycle Officer (uncredited)
Vince Barnett
as Man at Telephone Booth (uncredited)
Barbara Burgess
as Girl on Beach (uncredited)
Charo
as Mexican Maid (uncredited)
Corinne Cole
as Stewardess (uncredited)
Harry Fleer
as Male Nurse (uncredited)
Med Flory
Percy Helton
as Sanitation Man (uncredited)
James Jeter
as Police Lieutenant (uncredited)
Ray Kellogg
as Police Sergeant (uncredited)
Don Kennedy
as Marine Sergeant (uncredited)
Robert Kino
as Asian Man (uncredited)
Roland La Starza
as Jack - Motorcycle Officer (uncredited)
Florence Lake
as Assaulted Lady (uncredited)
Scot Lewis
as Guy on Beach (uncredited)
John Macchia
as Lifeguard (uncredited)
Howard Morris
as Cameo Role (uncredited)
William O'Connell
as Psychiatrist (uncredited)
Iris Rainer
Tony Regan
as Hotel Guest / Tourist (uncredited)
Rob Reiner
Michael Ross
as Bald Man (uncredited)
William Wellman Jr.
as Harold - Bellboy / Car Hop (uncredited)
John Nolan
as F.B.I. Agent
Bill Richmond
Screenstory
Director
Screenplay
W. Wallace Kelley
Director of Photography
Russel Wiles
Editor
Producer
Joe Luciano
Harry Betts
Original Music Composer
Frank Tuttle
Set Decoration
Ben Lane
Makeup Supervisor
Lyle R. Wheeler
Production Design
Jack Stone
Makeup Artist
Richard M. Rubin
Property Master
Moss Mabry
Costume Design
Hazel W. Hall
Script Supervisor
Joyce Morrison
Hairstylist
Dick Johnson
Camera Operator
Hal Bell
Second Assistant Director
Howard Pine
Unit Production Manager
Charles J. Rice
Sound Supervisor
Rusty Meek
Assistant Director
Guy C. Verhille
Wardrobe Designer
Al Overton Sr.
Sound
Jack Haynes
Joe E. Stabile
Associate Producer