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.
Starring Donald Wolfit, Vincent Ball, Barbara Shelley, Victor Maddern, William Devlin, Andrew Faulds, John Le Mesurier, Bryan Coleman, Cameron Hall, George Murcell