Those Obnoxious Aliens

Pitter-Patter Christmas Eve (1x10)

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10. Pitter-Patter Christmas Eve Megane and Lum's Stormtroopers set up a plot to embarrass Ataru and get Lum to leave him at the same time. They set up a date who will make a fool of Ataru, but Lum finds out and twists things around.