Aang searches for Appa while Katara struggles to keep everyone together to survive in the vast desert. Meanwhile, Iroh and Zuko seek help from an ancient secret society.
Avatar: The Last Airbender 2×11 “The Desert”
https://trakt.tv/shows/avatar-the-last-airbender/seasons/2/episodes/11 (https://www.frederickcalica.com/?p=3344741)