In 1989, "Tales from the Crypt" began airing on the U.S. cable-TV network HBO. The series ran through 1996, comprising 93 episodes and seven seasons. "Tales from the Crypt" spawned two children's television series on broadcast TV, "Tales from the Cryptkeeper" and "Secrets of the Cryptkeeper's Haunted House". It also spawned three "Tales from the Crypt"-branded movies, "Demon Knight", "Bordello of Blood", and "Ritual". In 1997, HBO followed the TV series with the similar "Perversions of Science", the episodes of which were based on stories from EC's "Weird Science". It ran 10 episodes.