Aku is staying at Nipper's house. When they hear strange noises from upstairs, they decide an alien lives there. They discover playing "alien" games is fun. But the older kids don't believe in the alien upstairs, so Nipper and Aku go up to find out for themselves.
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Lift Off S1E21 Above& Beyond Part 1 Lift Off S1E22 Above& Beyond Part 2