Director: Otto Brower, B. Reeves Eason

Cast: Gene Autry, Frankie Darro, Smiley Burnette, Betsy King Ross

Genre: Science Fiction, Western

Synopsis: A celebrity cowboy and his pals are amazed to discover a secret underground civilization located below their ranch, with advanced technology — which they intend to use to conquer the surface world.

Runtime: 70 Minutes

Year: 1940