When Chester accidentally memorises and destroys the only copy of a secret Russian formula for a new and improved rocket fuel, he and Harry are thrust into international intrigue, trying to stay alive while keeping the formula out of enemy hands.
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Bing Crosby as Harry Turner
Bob Hope as Chester Babcock
Joan Collins as Diane
Robert Morley as Leader of the 3rd Echelon
Walter Gotell as Dr. Zorbb
Felix Aylmer as Grand Lama
Dorothy Lamour as Dorothy Lamour
Roger Delgado as Jinnah
Jacqueline Jones as Blonde at Airport
Katya Douglas as 3rd Echelon Receptionist
Mei Ling as Ming Toy
Robert Ayres as American Official
Alan Gifford as American Official
Peter Sellers as Indian Neurologist (uncredited)
David Niven as Lama who remembers Lady Chatterly's Lover (uncredited)
Dean Martin as The 'Grape' on Plutomium (uncredited)
Frank Sinatra as The 'Twig' on Plutomium (uncredited)
Dave King as Mr. Ahso - Chinese Restaurant Owner (uncredited)
Pat O’Brien as Chinese Restaurateur (uncredited)
Peter Madden as Lama, Slim (uncredited)
Bob Simmons as Astronaut (uncredited)
Nosher Powell as Astronaut (uncredited)
Tutte Lemkow as Hotel Servant (uncredited)
Robin Hughes as American Official (uncredited)
Harry Baird as Nubian at Lamasary (uncredited)
Roy Patrick as Leader's Man(uncredited)
Victor Brooks as Leader's Man (uncredited)
John Dearth as Leader's Man (uncredited)
Jerry Colonna as Man Looking For a Match (uncredited)