: Prince Zuko of the Fire Nation, exiled and seeking to restore his honor, sees the light from the iceberg and begins his pursuit of the Avatar.

: After a playful day in the village involving penguin sledding , Aang and Katara trigger a flare in an abandoned Fire Nation ship. This alerts Zuko to their exact location, setting up the confrontation for the following episode.

: Siblings Katara and Sokka from the Southern Water Tribe discover an glowing iceberg while fishing. Katara’s accidental waterbending cracks it open, releasing Aang , a young Air Nomad, and his flying bison, Appa .

The series premiere introduces the world's lore and the core conflict of the .