You'll Find Out Cast & Crew
Peter LorreProfessor Karl Fenninger Boris KarloffJudge Spencer Mainwaring Bela LugosiPrince Saliano Helen ParrishJanis Bellacrest Dennis O'KeefeChuck Deems Alma KrugerAunt Margo Bellacrest Mary BovardMary (uncredited) Jeff CoreyMr. Corey (uncredited) Louise CurrieMarion (uncredited) Bess FlowersLady In Taxi (uncredited) Jeanne HouserJean (uncredited) Richard KiplingScript Man (uncredited) Eleanor LawsonMs. Gaby Lawson (uncredited) Larry McGrathApartment Complainer (uncredited) Frank MillsCabbie (uncredited) Mimi MontayeMimi (uncredited) Dorothy MoorePenny (uncredited) Leonard MudieReal Karl Fenninger (uncredited) Joseph NorthServant (uncredited) Frank O'ConnorApartment Responder (uncredited) Beulah ParkingtonMother (uncredited) Jane PattenJane (uncredited) Eugenia RafeeFrench Maid (uncredited) William TelaakMac (uncredited) Joan WarnerJoan (uncredited) Guy WebsterInfant (uncredited) Mary Martha WoodGeorgia (uncredited) David ButlerDirector / Producer / Story Frank RedmanDirector Of Photography Edward StevensonCostume Design Fred FleckAssistant Director 
