This is the episode where **Sailor Mercury** is kidnapped by Kunzite, and taken to the Dark Kingdom. There, she's brainwashed into becoming Dark Mercury. Sailor Mercury faces off against Kunzite all by herself. She does a few fancy moves (panty shots!), but none of them do Kunzite any damage. With one stroke of his sword, Kunzite releases dark energy into Sailor Mercury, rendering her unconscious.