Boo

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