Frankenstein's unscrupulous colleague, Dr. Bohmer, plans to transplant Ygor's brain so he can rule the world using the monster's body, but the plan goes sour when he turns malevolent and goes on a rampage.
Directed by
Erle C. Kenton
William Smith
Boy (uncredited)
Ralph Bellamy
Erik Ernst
Cedric Hardwicke
Dr. Ludwig Frankenstein / Dr. Henry Frankenstein (ghostly image)
Bela Lugosi
Ygor
Lon Chaney Jr.
The Frankenstein Monster
Doris Lloyd
Martha the Housekeeper
Dwight Frye
Villager at Meeting / Grave Robber (flashback) (uncredited)