Labyrinth of Mirrors! Chibi Moon Captured

"Labyrinth of Mirrors! Chibi Moon Captured!" is the 36th episode of the fourth season of the original anime, and is the 163rd episode overall. It first aired in Japan on February 10, 1996. The English dub title for this episode is "The Dark Legend", and it first aired in North America on November 13, 2000.

Summary
The other five Super Sailor Senshi go to help Super Sailor Chibi Moon, who has been captured by Queen Nehellenia as the evil Queen of Darkness desires to return of Helios' spirit and physical body. In order to stop them, Zirconia trap the five girls in a labyrinth of mirrors where each one must face her own dark side.

Trivia

 * Sailor Moon performed Moon Tiara Action for the last time in the original anime. Although she did perform it in A Night for Just Us! Usagi's Pinch, it was not the actual attack of yellow energy. She had merely thrown a pizza while shouting "Moon Tiara Action".