Boris Karloff plays a sinister doctor seeking revenge in this monster rally featuring the Wolf Man (Lon Chaney), Dracula (John Carradine) and Frankenstein's creature (Glenn Strange). Daniel: J. Carrol Naish. Rita: Anne Gwynne. Ilonka: Elena Verdugo. Carl: Peter Coe. Arnz: Lionel Atwill. Lampini: George Zucco. Curt Siodmak co-scripted.