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
John Chard
Your father was Frankenstein. Your mother was lightning. Of course the problem with the Frankenstein sequels, of the Universal Studios kind, was that they had to follow the genre firework that was "Frankenstein (1931)" and the monolithic titan that followed that one in 1935, "The Bride of Franken...