S4, E21: High School Graduation is coming up fast for Kim and Ron. He fears the changes that lie ahead, but Kim assures him that "Graduation is not the end of the world." As it turns out, "the end" might be closer than she thinks. Invading aliens interrupt the Graduation ceremony to abduct Kim. Vowing revenge against Kim and Dr. Drakken, Warmonga and her battle-mate Warhok take over the planet Earth. The fate of the world depends on Kim, Ron, Drakken and Shego working as a team.