In Search of the Silver Crystal: Chibi-Usa's Secret

Hoping to flush out the child they call the Rabbit, the Spectre Sisters learn from Rubeus that Chibiusa is terrified of thunder. Petz volunteers her droid Furaiki, which conjures a sudden storm that soaks Usagi. Sent to collect Chibiusa from her swimming lesson, Usagi finds the girl already gone, having fled into the downpour after watching the other children leave with their parents while she waited alone, aching for a family she cannot reach.

Searching in the rain, Usagi crosses paths with Mamoru, who agrees to help after once again rebuffing her. Hidden in an alley, Chibiusa confides in Luna-P and hears from Sailor Pluto that she must find the Silver Crystal and stay patient before she can return home to her parents. Overcome by another crash of thunder, she clutches her Space-Time Key, which misfires and warps gravity around the other four inner guardians before a burst of her power draws Petz and the droid straight to her.

Furaiki attacks and chases Chibiusa upstairs into the waiting guardians, who are then set upon by the droid. Sailor Moon transforms and, after Tuxedo Mask shatters the monster's drum with his roses to throw it off balance, destroys it with Moon Princess Halation. Berthier quietly observes Petz's failure and trails her retreat unnoticed. Once the gravity distortion fades, Chibiusa admits she only wanted to see her mother, and Tuxedo Mask gently shields her from the others' questions as she runs into his arms.

The episode gives Sailor Pluto her earliest appearance, glimpsed only as a heavily pixelated figure on the screen of Luna-P, and introduces the Space-Time Key. In Chibiusa's daydream her parents do not yet match Neo-Queen Serenity and King Endymion, the woman shown with long straight brown hair, unlike the manga where their silhouettes already fit their true forms. A small background gag gives the video game Shingo plays a Mount Rushmore backdrop.