Aliens looking for a power source trace one to the Addams house. After researching TV shows from the seventies to learn Earth culture, they disguise themselves as Greg and Marcia Brady, hoping to be inconspicuous. At the Addams house, they encounter all sorts of ookiness, including a Trainwreck and Moonbathing. They discover that the power source they need is Uncle Fester, and they have a dance contest with Morticia and Gomez to win him. However "Greg" and "Marcia" lose, but after explaining their case, "Greg" comes up with a solution.