Elenco & Equipe de Chave Misteriosa
Boris KarloffDavid Mallory Alan BaxterJohn Baron aka The Kid Hobart CavanaughPetty Louie Samuel S. HindsSteven Ranger David OliverMike Callahan Frank ReicherCarl - gang engineer Edwin MaxwellLawyer Kruger George ClevelandSam Adams - Company Engineer (uncredited) Ruth FallowsWaitress (uncredited) George HumbertMr. Spinelli (uncredited) Nina CampanaMrs. Spinelli (uncredited) Charles C. WilsonPolice Capt. Wallace (uncredited) Chuck HamiltonPoliceman (uncredited) Robert Presnell Sr.Produtor Jack OttersonArt Direction Loren PatrickArt Direction George RobinsonDirector Of Photography Gilbert KurlandSound Supervisor John P. FultonVisual Effects William A. Piercehistoria 
