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The film's working title was Ghost Mountain. Hollywood Reporter news items add the following information about the production: Ronald Reagan was considered for the lead, and Lauren Bacall was suspended for the sixth time in six years when she refused to work in this film. Shortly after filming, Patrice Wyman became Errol Flynn's fourth wife. This was the first Warner Bros. film since the war to be entirely shot on location. It was filmed in Gallup, New Mexico.