Bizarro can create a device to enlarge the Legion of Doom to 100 feet but needs three rare elements first. He has already obtained one, a formula from an asteroid. Bizarro & Sinestro retrieve one of the elements from the moon's core by cutting it in half. However, Batman, Robin and Superman repair the moon, save the two astronauts, and capture the two villains. Meanwhile Toyman and Captain Cold pursue another element at the Parthenon but Aquaman and Green Lantern end up capturing them. Lex Luthor and Brainiac attack the Hall of Justice in the guise of freeing their teammates, but it is a ruse to distract the Super Friends as the captured villains free themselves using Sinestro's ring, which was removed but was prepared to go off at a certain time. They use the Justice League's computer to create the Growth Ray and enlarge themselves. After a brief fight, the Super Friends are captured by Captain Cold's freeze ray and sent to Saturn as the Legion of Doom creates a force field around the Earth to keep them out. Bizarro conquers Washington DC, Sinestro takes over Peking, Captain Cold invades Africa and Toyman attacks London. On Saturn a device of Batman frees the Superfriends from the ice. After battling gaseous monsters, Flash creates a tornado that sends the Super Friends back to Earth where they reconfigure the Justice League satellite into letting them through the force field. The Justice League computer duplicates the growth ray and the Super Friends use it to battle the Legion of Doom. Green Lantern bottles up Sinestro, Flash freezes Captain Cold, Batman stops Toyman and Superman cages Bizarro. However, Lex Luthor teleports the captured members to freedom and uses a Hall of Doom decoy to distract the Super Friends as they escape. Green Lantern, Flash, Batman and Superman are the Giants of Justice!
