The Unknown Terror Skuespillere og folkene bag
Paul RichardsPeter Morgan Martín GarralagaLead Villager Patrick O'MooreDr. Willoughby Charles GreyJim Wheatley / ?The Monster Man Charles PostalHiggs (butler) Charles CirilloNative (uncredited) Jim WhitecloudNative (uncredited) Foster HoodNative (uncredited) Charles Marquis WarrenInstruktør James W. SullivanArt Direction G. W. BernstenSet Decoration Joseph F. BirocDirector Of Photography Robert O'DellWardrobe Supervisor Vou Lee GiokarisWardrobe Supervisor Nathan BarragarAssisterende instruktør / Produktionsleder Fred W. BergerSupervising Film Editor Michael LucianoFilmklipper Raoul KraushaarKomponist af original musik 
