Season 1, Episode 1 - "The Boy in The Iceberg"
17 April, 2009
While fishing, Sokka and Katara discover Aang and his flying bison Appa icebound floating on the sea. After freeing him, they discover that Aang is an Airbender, a race of people assumed to have died out a hundred years before. Later, he reluctantly reveals that he is also the Avatar, the only person with the power to manipulate all four elements. The Avatar is reincarnated generation after generation and would be the only one who could prevent the Fire Nation from conquering all the nations, which is the reason why the Fire Nation started the war. Meanwhile, Zuko, the banished Prince of the Fire Nation, is patrolling the seas in search of the Avatar. While exploring an abandoned Fire Nation ship, Katara tells Aang about the war that had been going on for the past hundred years. They accidentally set off an explosion in the ship, which alerts Zuko to the village.
