A group of aliens worship Jenny after she is mistaken for a "comet goddess". It's fun at first but they soon drive Jenny crazy. However, when the aliens demand that Jenny summon the sun to turn her Earth into a comet, she retaliates by putting their spaceship in orbit around the sun. The Earth is saved, but someone's missing. Sheldon accidentally stowed away with them. There is a sequel to this episode called "Good Old Sheldon".