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
Doris Lloyd
Martha the Housekeeper
Bela Lugosi
Ygor
Lionel Belmore
Councilman (uncredited)
Evelyn Ankers
Elsa Frankenstein
Harry Cording
Mob Leader (uncredited)
Colin Clive
Dr. Henry Frankenstein (flashback) (uncredited)
Olaf Hytten
Adolph Hussman
Cedric Hardwicke
Dr. Ludwig Frankenstein / Dr. Henry Frankenstein (ghostly image)
Dwight Frye
Villager at Meeting / Grave Robber (flashback) (uncredited)