If you are looking at the Japanese episode numbering, the 40th episode of the R season (which is overall episode 86) is also a major highlight . Sailor Moon R - WikiMoon

The subsequent sequence is a masterclass in "talk-no-jutsu" before it became a trope. Usagi reaches through the Dark Crystal, embraces Chibiusa, and whispers, "You are my future daughter. I will always find you." This heals the corruption instantly. It is not violence that saves the day—it is maternal love.

This episode is a pivotal moment in the Black Moon Clan arc, focusing on redemption, tragedy, and the humanization of the series' villains. Sailor Moon Wiki

More text-heavy and emotional.