Boo

Edward Van Sloan as Dr. Waldman (edited from "Frankenstein") Gustav von Wangenheim as Hutter (edited from "Nosferatu") Morton Lowry as Man Reading "Dracula" Mae Clarke as Elizabeth (edited from "Frankenstein") Raymond Hackett as Paul (edited from "The Cat Creeps") Elizabeth Patterson as Susan (edited from "The Cat Creeps") Boris Karloff as Frankenstein's Monster (edited from "Frankenstein") Lawrence Grant as Crosby (edited from "The Cat Creeps") Max Schreck as Dracula-Nosferatu (edited from "Nosferatu") Helen Twelvetrees as Annabelle West (edited from "The Cat Creeps")