On the DVD version of this movie, in the last scene, Bob Hope kicks the Japanese spy in the rear and says "that's to save your face". Lip reading it, he actually says "that's for Pearl Harbor!". It is unknown when the dub was done or what played in the theater.
Samuel Goldwyn paid Paramount $133,500 to borrow Bob Hope for twelve weeks, during which time Hope made this film and Il pirata e la principessa (1944).
Hedy Lamarr was borrowed from Metro Goldwyn Mayer and signed to do the part of Margo/Olga Venescue. The part was more built up originally. When Lamarr got too busy with assignments at her home studio of M.G.M. she suggested her fellow countryman and friend Lenore Aubert, who hadn't been signed to Goldwyn yet and was doing " The Man Who Came To Dinner" at The LaJolla Playhouse in LaJolla when Goldwyn took Lamarr's advice and sent his talent scout to look at Aubert. He did so and right then when calling his boss Sam Goldwyn to tell him how beautiful she is and a Hedy Lamarr type, Sam Goldwyn told him to bring her in and Goldwyn signed her to a seven year contract. Because Dorothy Lamour was a big star Aubert's part was cut down by giving her less to do than if Hedy Lamarr had accepted the role.
The film was also one of the first Hollywood pictures to be affected by the War Production Board's order for the studios to limit costs. This resulted in some scenes being filmed in an abandoned Los Angeles gas works factory instead of in the studio. As filming wrapped, in September 1942, Samuel Goldwyn awaited permission from Washington to end the film by portraying Axis powers being apprehended before December 7, 1941, the date of the Pearl Harbor attack. The end was approved, and one of the few requests for changes came from the embassy of neutral Turkey, who asked that the name of the Axis spies' nightclub be changed from Caf Instanbul to Caf Moresque to avoid any connection to their country.