Upon returning to the tribe, Aang is promptly banished by a furious Sokka for alerting the ship of the Fire Nation prince. Later, Zuko attacks the Southern Water Tribe village and demands the Avatar be surrendered to him. Aang returns to the village, revealing in the process that he is the Avatar, to surrender himself to Zuko as long as he agrees to leave the village alone. Aboard Zuko's ship, Aang frees himself and battles Zuko. Katara and Sokka go on Appa to save Aang, and the three of them manage to escape. Katara and Sokka decide to accompany Aang on his travels to the Northern Water Tribe to find a waterbending teacher for both Aang and Katara. (From http://avatar.wikia.com/wiki/The_Avatar_Returns)