Graduation

"Graduation" is a two-part episode of Kim Possible that served as the series finale. It was originally aired as a one-hour special on September 7, 2007, following a three-day marathon of the previous 85 episodes. After its original airing, it was separated into two episodes for subsequent broadcasts.

Synopsis
While Ron worries that graduation means the end of his relationship with Kim, Warmonga returns with her equally vengeful battle-mate, Warhok the conqueror. And on Graduation Day, too. Kim's going to have her hands full with this one, especially when she and Drakken get abducted by said invaders. Aided by Drakken and Shego, Kim and Ron prepare to fight off the Lorwardian assault, leading up to a final showdown with their heartless leader, Warhok.