Ygor resurrects Frankenstein's monster and brings him to the original doctor's son, Ludwig Frankenstein, for help. Ludwig, obsessed with the idea of restoring the monster to full power, is unaware that his various associates each have different ideas about whose brain should be transplanted into the monster's skull. Cast: - Lon Chaney Jr. as the Monster - Cedric Hardwicke as Dr. Ludwig Frankenstein / Henry Frankenstein - Ralph Bellamy as Erik Ernst - Lionel Atwill as Dr. Theodore Bohmer - Béla Lugosi as Ygor - Evelyn Ankers as Elsa Frankenstein - Janet Ann Gallow as Cloestine Hussman - Barton Yarborough as Dr. Kettering - Doris Lloyd as Martha - Leyland Hodgson as Chief Constable - Olaf Hytten as Hussman - Holmes Herbert as Magistrate - Michael Mark as Councillor (uncredited) - Dwight Frye as Villager (uncredited) Runtime: 67 minutes