This episode is part of the Avatar Book Two - Earth
Avatar The Last Airbender Episode Guide ~ via Wiki
While flying over a swamp, Aang, Katara, Sokka, and Appa get separated by a tornado. After landing on the swamp, Appa and Momo are captured. Meanwhile, Sokka sees visions of Princess Yue, Katara sees visions of her mother, and Aang sees visions of an unknown girl. Elsewhere, Zuko steals food for himself and Iroh.