During a trip to "Dizzneeland" the Simpsons board the wrong ride, Rocket To Your Doom, and are transported through the galaxy to Kang and Kodos' home planet, where they are held captive at the local zoo and the inhabitants decide to eat Homer.

When inventor Elon Musk lands in Springfield, he and Homer become fast friends and revolutionize the town's nuclear plant. But when Musk goes overboard and Mr. Burns wants him removed, Homer must figure out a way to break up with him.