The United Underworld is an evil organization that is formed in the 1966 Batman movie. Its main members are the four main enemies of Batman: The Joker, the Penguin, the Riddler, and the Catwoman. Several pirates were working for them, the only ones with names being Morgan, Quetch, and Bluebeard. Their base was inside a bar next to the ocean. Their objective was to take over the world, and to kill Batman so he couldn't stop them.