After a road accident in Hungary, the American honeymooners Joan and Peter and the enigmatic Dr. Werdegast find refuge in the house of the famed architect Hjalmar Poelzig, who shares a dark past with the doctor.
Hjalmar Poelzig
Boris Karloff
Dr. Vitus Werdegast
Bela Lugosi
Peter Alison
David Manners
Joan Alison
Julie Bishop
The Majordomo
Egon Brecher
Thamal
Harry Cording
Karen
Lucille Lund
The Sergeant
Henry Armetta
The Lieutenant
Albert Conti
Cult Organist
John Carradine
Cultist (uncredited)
John George
Waiter (uncredited)
Albert Pollet