|Neptune Beyond the Closet|
|Original airdate:||9 December 1981|
|Previous episode:||The Doll of Ill Will|
|Next episode:||The Confusing Dinosaur Age|
Neptune Beyond the Closet (おし入れの向うは海王星, Oshiire no Mukou wa Kaiousei?) is the first half of the 8th episode of Urusei Yatsura. It originally aired on 9 December 1981. Its opening theme is Lum no Love Song and its ending theme is Ucchu wa Taihen ja!.
First appearance of Oyuki, Lum's friend and queen of Neptune. Oyuki also has incredible ice powers. Megane and friends visit while Shinobu is nursing Ataru, who has a cold; and they discover a gate to Neptune in Ataru closet. By accident, they go through this gate and arrive on Neptune to be greeted by Lum and Oyuki.