Disney's Greatest Villains was a one-hour television special that first aired on May 15, 1977 on The Wonderful World of Disney. It was a somewhat updated version of 1956's Our Unsung Villains, and was also used to feature Madame Medusa, the villain in the then-upcoming Disney animated film The Rescuers. The program was hosted by Hans Conried, reprising his role as the Magic Mirror from Our Unsung Villains and other Disney specials. The Mirror explained the importance of villains, with most of his dialogue taken from Our Unsung Villains.