Premonition of World's End? Mysterious New Senshi

After she experiences apocalyptic visions, Rei is attacked by an extremely powerful monster that Sailor Moon cannot fight.
The North American dub title for this episode is Star Struck, Bad Luck.

Summary

Episode Data
Usagi's brooch is broken, reversing her transformation
Original Episode
Name (Kanji/kana):	地球崩壊の予感? 謎の新戦士出現
Name (Romaji):	{{{Name (Romaji)}}}
Name (Translated):	Premonition of World's End? Mysterious New Senshi
Name (Viz Dub):	{{{Name (Viz Dub)}}}
Episode Number:	90
Director:	Junichi Satou
Writer:	Sukehiro Tomita
Animation Director:	Masahiro Ando
Air Date:	19th of March, 1994
Previous Episode:	Usagi and the Girls' Resolve! Prelude to a New Battle
Next Episode:	The Rod of Love is Born! Usagi's New Transformation
First English Dub Episode
Name:	Star Struck, Bad Luck
Number:	83
Company:	Cloverway
Air Date:	12th of June, 2000
Previous Episode:	Follow the Leader
Next Episode:	Crystal Clear Again

Rei is having a strange dream. Untransformed, she watches in horror as the world around her, seen in red light, is slowly consumed by a black wave. The four other Inner Senshi stand like red statues in front of her, motionless. A large and elaborate crystal appears behind her, blinding her with its shine. The city is being destroyed, building by building, as the crystal splits into three smaller crystals, then all of them disappear. Eventually, the black wave consumes everything, shattering her statue-like friends into pieces.

Rei wakes up to see Usagi sleeping, which aggravates her. The five girls are all at Rei's house, studying. Usagi wakes up and tells the others her silly dream, after which they lecture her about treating studies seriously. While the others are talking, Rei recalls her dream.

At his laboratory, which is filled with various chemistry equipment, a mad scientist is heating a test tube with some purple liquid inside. A small round object inside it starts growing, and eventually the tube breaks, with a stripped egg emerging from it and flying upwards. The professor's assistant, a red-haired woman whom he identifies as Kaolinite, appears, and he explains their goal: to find the Holy Grail, which will allow them to control the world. For the Grail to appear, they need to find three talismans hidden inside humans' pure hearts. The egg flies out of the lab and Kaolinite disappears, leaving her lab coat behind.

Back at school, Usagi gets upset after failing a test. She walks down the street, looking straight down, thinking what her parents will say when they find out, and wondering why she is always attracted to Rei at such moments. Naturally, Rei is walking towards her in the opposite direction, also looking down, and they collide.

At a fountain, Rei and Usagi put their foreheads under a stream of water to ease the pain. As always, Rei pokes fun at Usagi for her bad marks, but admits that she has other good qualities. Usagi notes that this admission is unusual, and suddenly Rei's dream flashes in her head again. She changes the subject to their plans for the future, and eventually Usagi is convinced that while Rei sometimes says mean things, she has a kind heart.

At Hikawa Shrine, Kaolinite (floating in the air) watches as the egg implants itself into a tree, and says that the person with a pure heart will appear soon. Shortly thereafter, Rei appears.

Usagi is sitting on a street stairway, sighing at her test results and wondering what Mamoru would say about it