Ruler of the Galaxy! Galaxia's Threat

Sailor Moon learns what happened to Mamoru: Galaxia took his Star Seed in the beginning of the season. The Senshi retreat to Galaxy TV, where Uranus, Neptune, Pluto, and Saturn head off to fight Galaxia. Their efforts prove futile, and Galaxia simply offers them a deal to side with her. Pluto and Saturn oppose, but Uranus and Neptune accept Galaxia's bracelets. To prove their loyalty to her, they kill Pluto and Saturn and obtain their Star Seeds.