The working title of this film was Mexican Spitfire and the Ghost. A Hollywood Reporter production chart adds Barbara Moffett to the cast, but her participation in the final film has not been confirmed. This was producer Cliff Reid's final picture for RKO. For additional information about the series, consult the Series Index and see entry for the 1939 film Mexican Spitfire in AFI Catalog of Feature Films, 1939-40; F3.2846.