Name: Princess Sailormoon Toujyou! [Princess Sailormoon Appears!]
Original Air Date: June 19, 2004
Director: Nobuhiro Suzumura
Writer: Yasuko Kobayashi

Important Plot Points:

First appearance of the Moon Phase

First time Mio and Queen Beryl appear together

Nephrite is killed by Queen Beryl's command

First Appearance of Princess Sailormoon

Princess Sailormoon first uses her sword attack

Mamoru is kidnapped by the Dark Kingdom

Trivia:

This episode has a fanlisting