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The film's title card reads: "Vera Caspary's Out of the Blue." Caspary's screen story was serialized in Today's Woman in September 1947. According to a Los Angeles Examiner news item, Caspary, who wrote the novel on which Fox's successful film Laura was based (see entry above), secured a "percentage deal" with Eagle-Lion for this picture. Joan Leslie was slated to star in the film, according to the same item. In January 1947, Tom Conway was announced in Hollywood Reporter as the picture's male lead. Hollywood Reporter then announced that Eagle-Lion was borrowing James Craig from M-G-M to star in the production.