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.
Dr. Ludwig Frankenstein / Dr. Henry Frankenstein (ghostly image)
Cedric Hardwicke
Erik Ernst
Ralph Bellamy
Dr. Bohmer
Lionel Atwill
Ygor
Bela Lugosi
Elsa Frankenstein
Evelyn Ankers
The Frankenstein Monster
Lon Chaney Jr.
Cloestine Hussman
Janet Ann Gallow
Dr. Kettering
Barton Yarborough
Martha the Housekeeper
Doris Lloyd
Chief Constable
Leyland Hodgson
Adolph Hussman
Olaf Hytten
Magistrate
Holmes Herbert
Villager at Council Meeting (uncredited)
Richard Alexander
Councilman (uncredited)
Lionel Belmore
Villager (uncredited)
Chet Brandenburg
Dr. Henry Frankenstein (flashback) (uncredited)
Colin Clive
Mob Leader (uncredited)
Harry Cording
Constable (uncredited)
George Eldredge
Villager at Meeting / Grave Robber (flashback) (uncredited)
Dwight Frye
Mayor (uncredited)
Lawrence Grant
Villager (uncredited)
Otto Hoffman
Hans, Villager at Council Meeting (uncredited)
Brandon Hurst
Councilman (uncredited)
Michael Mark
Boy Playing Indian (uncredited)
Jimmy Phillips
Boy (uncredited)
William Smith
Constable (uncredited)
Ernie Stanton
Sektal (uncredited)
Julius Tannen
Villager at Hearing (uncredited)
Harry Tenbrook
Mother of Hungry Children (uncredited)
Glen Walters
Goose-herd (uncredited)
Janet Warren
Boy (uncredited)
Teddy Infuhr