Black Sabbath is a 1963 Italian horror anthology film directed by Mario Bava. The film consists of three separate tales that are introduced by Boris Karloff. The order in which the stories are presented varies among the different versions in which the film has been released. In the original, Italian print, the first story, titled "The Telephone", involves Rosy who continually receives threatening telephone calls from an unseen stalker. The second is "The Wurdulak", where a man named Gorca (Karloff) returns to his family after claiming to have slain a Wurdulak, an undead creature who attacks those that it had once loved. The third story, "The Drop of Water", is centered on Helen Corey, a nurse who steals a ring from a corpse that is being prepared for burial and finds herself haunted by the ring's original owner after arriving home.

Black Sabbath were an English rock band formed in Birmingham in 1968 by guitarist Tony Iommi, drummer Bill Ward, bassist Geezer Butler and vocalist Ozzy Osbourne. They are often cited as pioneers of heavy metal music. The band helped define the genre with their first three albums Black Sabbath, Paranoid and Master of Reality (1971). Following Osbourne's departure in 1979, the band underwent multiple line-up changes, with Iommi being the only constant member throughout their history.