Sailor Moon Season 102 Episode 21 Usagi's Awakening: A Message from the Distant Past

Sailor Venus finally finds the entrance to the Dark Kingdom's hideout. The Sailor Guardians rush in, only to fall into Kunzite's trap, which hurls them into the past. When they wake up, the girls find themselves in a world called Silver Millennium, where they meet Queen Serenity, the mother from Usagi's past life.