Mxyzptlk's Flick: Batman, Robin, and the Wonder Twins are thrown into a movie by Mr. Mxyzptlk. The Sink Hole: Wonder Woman arrives to help a sheriff from the hills of West Virginia and investigate why a giant Cobra is creating sink holes. The Alien Mummy: While accompanying Professor Naska and his students on a field trip to Ancient Aztec ruins in Mexico, El Dorado is attacked by Alien Invaders. When El Dorado scares them off, an angered Alien Mummy attacks El Dorado and the others. Meanwhile at the Hall of Justice, Superman and Wonder Woman receive a U.F.O. alert and head out to Mexico. When the two Super Friends arrive see The Alien Mummy has El Dorado and the others have been put under mind control. When Superman and Wonder Woman confront the Alien Mummy, he turns both of them into golden statues.