Uncle Fester is asked to stand in for King Lester of Colytonia, whose life is in mortal danger, since they look nearly identical. Meanwhile, the King stays in The Addams Family Mansion. He is at first appalled by the ookiness, but he likes the Trainwreck, the family football game, and Gomez' open displays of affection for Morticia. When an assassin is sent to the house, Wednesday and Pugsley uncover the mastermind behind the plot.