Two teddy bears in a spaceship land on Earth to look for a worm. One is quite handy with a laser gun. Courage plays the horn and it attracts a worm, which just happens to be the worm that the teddy bears are after. When Muriel won't tell them where it is, and the teddy bears blow up part of their house, the worm comes and it turns out he is a giant blue worm from outer space that eats the teddy bears, as well as Muriel. The worm belongs to a giant alien named Tulip. Courage lures the worm in the teddy bear's spaceship by playing the horn. Courage peddles the spaceship like a bike and eventually reaches Tulip's home planet. Tulip calls the worm Wormy, and says Wormy and the teddy bears are her pets. Courage puts in a vinegar and peanut butter-jelly sandwich in Wormy's stomach and he vomits Muriel and the teddy bears back up. Tulip wants Muriel and Courage as her new pets, but they escape and take the teddy bear's spaceship back to Earth.
- This is the last episode where Lionel G. Wilson voices Eustace.