Episode 39 - "The Guru" (219)

[Kiara]

Aang starts to learn control of the Avatar State from Guru Pathik at the Eastern Air Temple. Sokka is reunited with his father. Toph teaches herself "metalbending" while Xin Fu and Master Yu are transporting Toph back to her parents. Katara and the generals plan the invasion of the Fire Nation. Later, she sees Zuko and Iroh running their tea shop.

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[zuko614]

"you must learn to let go"
no kataang if the avatar state is to return