Batman uses the replay from the Batmobile to convince the other JLU members that Superman is a traitor. They reluctantly go to confront him to find that he is sabotaging Micron's recovery tank. Superman attacks them, then flees to his Fortress of Solitude in the Arctic before Terry can use the kryptonite. Pursuing him, the JLU defeats first some Superman robots and than using the kryptonite, Superman himself. They discover that Superman is under the control of a starfish-alien that has attached itself to his nervous system. They find that the starfish, part of Superman's alien zoo collection, escaped by taking over Superman years ago, and then bred. They enter a cavern to find the thousands of breeding starfish, and everyone but Terry is possessed. Terry escapes and mangaes to use an electric shock to separate Superman from his starfish. They team up and manage to free the other JLUers just before the starfish can escape into the ocean. Using Barda's boom-tube technology and Aquagirl's telepathic abilities, they send the creatures back to their home planet. Terry decides not to remain a member of the JLU.