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The working titles of this film were Shadow of a Gunman and The Lone Texan. The 1959 Twentieth Century-Fox release Lone Texan bears no relationship to this film. Although the onscreen credits read "introducing Fintan Meyler," the 1957 film Zero Hour (see below) marked Meyler's screen debut. A Hollywood Reporter production chart places Barton MacLane in the cast, but he was not in the released film has not been confirmed. Modern sources add Dan Simmons and Tony Douglas to the cast.