Get a double dose of terror with these two spine-chillers penned by legendary horror scribe Jimmy Sangster. In Blood of the Vampire, a doctor falsely accused of medical heresy is sent to a remote castle prison. But the scientist (Donald Wolfit) who runs the place hides a terrifying secret. In The Hellfire Club, a man (Keith Michell) returns to his ancestral estate to discover that his cousin has turned it into a haven for violence and lust.