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The working title of this picture was Doctor. According to materials contained in the Twentieth Century-Fox Produced Scripts Collection at the UCLA Theater Arts Library, the original story of this picture was by Boris Ingster, and was based on the exploits of a real-life doctor. Darryl Zanuck objected to the subject, however, and insisted the protagonist be a political refugee. Zanuck also suggested adding Leonid Kinskey to the cast for a "lighter touch," and suggested Alexander Granach for the role of the woodcutter. Although the film credits Harari and Arthur with original screenplay, Screen Achievements Bulletin credits them with original story and screenplay. Lucien Andriot is listed as photographer on an early Hollywood Reporter production chart. Twentieth Century-Fox borrowed Ray Milland from Paramount to appear in this picture. Backgrounds for the film were shot on location at Sun Valley, ID, in March 1939.