Stranded on the moon after his extraordinary airplane takes him into outer space, a boy meets a marooned young Martian with a broken spacecraft, and the two new friends work together to return to their respective homes.

The Bad Guys find themselves sixty-five million years in the past where they must avoid being eaten by dinosaurs, fix their broken time machine, and get back home before an evil alien destroys the world.

Despite her mother's reassurances, a young girl is convinced that aliens are coming to eat her, until she decides to trick them into taking her brother instead.

"Mr. Wuffles ignores all his cat toys but one, which turns out to be a spaceship piloted by small green aliens. When Mr. Wuffles plays rough with the little ship, the aliens must venture into the cat's territory to make emergency repairs"--

In the middle of the night, Brian transforms himself into Captain Pajamas, Defender of the Universe, to save his older sister Jessie from attacking aliens, but they are nowhere to be found.

Jack the dog plays happily in his backyard with visitors from outer space, but is not so sure that he wants to go home with them.

Duncan Dougall discovers that his teacher, Miss Karpou, is an alien, but not before she chooses him to participate in an experiment in which he dons a helmet that fries his brains, but makes him smarter.

When a mysterious visitor arrives from outer space one night, a family dog makes an unexpected friend.

Geronimo Stiltonix and his spacemice crewmates travel to a planet where delicious mozzarella grows in order to restore harmony between its alien inhabitants and the cheese-loving slurp monster.

Finn and his friends travel to the Subatomic, a microscopic world where Finn hopes to find his father and defeat the Plague once and for all.