While on their way to a Halloween party, Mordecai and Rigby tell scary stories to Benson, Pops, Skips, Muscle Man, High Five Ghost and Thomas. Payback: Mordecai keeps seeing the spirit of his deceased uncle after he accidently knocks him into the ball insert in a bowling alley. Party Bus: Mordecai, Rigby, Margaret and Eileen board a haunted bus and discovers that the passengers become more elderly as the bus moves forward. Wallpaper Man: Mordecai and Rigby hire an interior designer to re-wallpaper the house, but they soon find out that the designer is an evil giant arachnid.