Season 3...Sailor Moon S...
This season begins with Professor Tomoe working in his lab. An accident occures while he was trying to open a gateway to another world. The explosion kills everyone but him, including his only daughter, Hotaru. Soon after a Demon Master finds him and offers a pact, he will revive Hotaru as long as the Professor works for him, Tomoe agrees. He is forced to search for "Pure Heart Crystals" and "The Holy Grail", to help him open a gateway large enough for Master Pharaoh 90 to pass through.
At the same time, the Outer Senshi are introduced. Sailor Uranus, Sailor Neptune and Sailor pluto, Sailor Chibi-Moon (Chibi-Usa for the future) also appears. The Outer Senshi are also looking for the Holy Grail. They know that the three Talismans that join toghether to form the Grail are in the "Pure Heart Crystals".
The Outer Senshi realise later in the season, that they are the carriers of the talismans. They then combine them and "The Holy Grail". The Grail gives Sailor Moon a new transformation. Hotaru becomes Mistress 9 after a demon takes control of her body. In this form she takes control and manages to open a gateway for Pharaoh 90. After doing so, she is overwhelmed by the power within her, she is actually Sailor Saturn.
At the end of the season, Sailor Saturn destroys Pharaoh 90, and kills herself in the process. Sailor Moon then uses her power to bring her back to life again as a baby. She also saves Professor Tomoe, giving both chance to live normal lives.