Peter Graves
— Agent / Tom Kaylor
Mala Powers
— Valerie 'Val' Owens
Chuck Connors
— Mink Reynolds
Merry Anders
— Amy 'Miss Diesel of 1958' Phillips
Roy Engel
— Wally Morse
Robert B. Williams
— 'Dunc' Clayton
Harry Lauter
— Steve Hummel / Mr. Brown
Pete Kooy
— Payson
Robert Christopher
— Lennie Owens
Gordon Armitage
Benjie Bancroft
Claire Carleton
— Mabel (uncredited)
Bud Cokes
Roy Damron
— Club Patron (uncredited)
John Dierkes
George Ford
— Diner Patron (uncredited)
Larry Mancine
Kathy Marlowe
Thomas Martin
Paul Maxwell
— Doctor (uncredited)
John Mitchum
— Handler (uncredited)
Charles Postal
Gloria Rhoads
Robert Shayne
— Frank Ainsley (uncredited)
Fred Sherman
— Howard (uncredited)