ZIM discovers his almighty leaders never had any intention of coming to Earth and he loses confidence in himself for the first time in his life, which is the big break his human nemesis, Dib has been waiting for.
Lincoln and the Louds are ecstatic to welcome their new Gran-Gran, Myrtle, into the family with a tropical wedding celebration; but the festivities are cut short when an old nemesis from Myrtle's secret agent past appears on the island.
Lincoln and his friends officially start going to middle school, but problems arise when Lincoln learns that he's stuck in a different class from his friends. And when he tries to get transferred to his friends' classroom, he instead ends up being moved to a different school in Canada! Meanwhile, Lori has trouble fitting in at college, and Lynn Sr. and Rita try to get Lily to finish potty training.
