A man and wife are terrorized by Mad Scientist Dr. Callistratus who was executed but has returned to life with a heart transplant. Along with his crippled assistant Carl, the 'anemic' Mad Scientist, believed to be a vampire, conducts blood deficiency research on the inmates of a prison hospital for the criminally insane to sustain his return to life.

Donald Wolfit
as Doctor Callistratus

Vincent Ball
as Dr. John Pierre

Barbara Shelley
as Madeleine Duval

Victor Maddern
as Carl

William Devlin
as Kurt Urach

Andrew Faulds
as Chief Guard Wetzler

John Le Mesurier
as Chief Justice

Bryan Coleman
as Monsieur Auron

Cameron Hall
as Drunken Doctor

George Murcell
as First Guard
Wuchak
**_“Vampires? We don’t need no stinkin’ vampires”_** In 1880 Carlstadt, Düsseldorf, a doctor (Vincent Ball) is sentenced to life-in-prison for malpractice in performing an emergency blood transfusion, which had never been done successfully. Instead of being sent to the prescribed penal island, he...