"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."
Cedric Hardwicke
as Dr. Ludwig Frankenstein / Dr. Henry Frankenstein (ghostly image)
Ralph Bellamy
as Erik Ernst
Lionel Atwill
as Dr. Bohmer
Bela Lugosi
as Ygor
Evelyn Ankers
as Elsa Frankenstein
Lon Chaney Jr.
as The Frankenstein Monster
Janet Ann Gallow
as Cloestine Hussman
Barton Yarborough
as Dr. Kettering
Doris Lloyd
as Martha the Housekeeper
Leyland Hodgson
as Chief Constable
Olaf Hytten
as Adolph Hussman
Holmes Herbert
as Magistrate
Richard Alexander
as Villager at Council Meeting (uncredited)
Lionel Belmore
as Councilman (uncredited)
Chet Brandenburg
as Villager (uncredited)
Colin Clive
as Dr. Henry Frankenstein (flashback) (uncredited)
Harry Cording
as Mob Leader (uncredited)
George Eldredge
as Constable (uncredited)
Dwight Frye
as Villager at Meeting / Grave Robber (flashback) (uncredited)
Lawrence Grant
as Mayor (uncredited)
Otto Hoffman
Brandon Hurst
as Hans, Villager at Council Meeting (uncredited)
Michael Mark
Jimmy Phillips
as Boy Playing Indian (uncredited)
William Smith
as Boy (uncredited)
Ernie Stanton
Julius Tannen
as Sektal (uncredited)
Harry Tenbrook
as Villager at Hearing (uncredited)
Glen Walters
as Mother of Hungry Children (uncredited)
Janet Warren
as Goose-herd (uncredited)
Teddy Infuhr
Scott Darling
Screenplay
Ted J. Kent
Editor
Ellis Burman
Makeup Artist
Russell A. Gausman
Set Decoration
Jack Pierce
Elwood Bredell
Director of Photography
Milton Krasner
Erle C. Kenton
Director
Vera West
Costume Design
George Waggner
Producer
Harold H. MacArthur
Art Direction
Jack Otterson
Bernard B. Brown
Sound Director
Charles Maxwell
Orchestrator
Eric Taylor
Original Story
Charles Previn
Music
Eddie Parker
Stunts
John P. Fulton
Special Effects
Charles S. Gould
Assistant Director
Hans J. Salter
Original Music Composer
Mary Shelley
Characters
Charles Carroll
Sound