Baron Von Frankenstein (voice of Boris Karloff) has decided to retire as the head of the Worldwide Organization of Monsters. But first, he must inform the other monsters about his plans. How to deliver the news? How else - through a MAD MONSTER PARTY! Von Frankenstein's guests include a who's who of Halloween favorites, including the Werewolf, Dracula, Dr. Jekyll and Mr. Hyde, the Mummy, the Invisible Man and more. But who among them is fit to be the new head of the monsters? Find out in this treasured stop-motion classic from the team who brought you Rudolph, the Red-Nosed Reindeer, Frosty the Snowman and other beloved holiday specials.