S1, E1: Katara and Sokka, a brother and sister from the Southern Water Tribe, discover a twelve-year-old boy frozen in an iceberg. Katara wonders if this boy is the Avatar whom the world has been awaiting for a hundred years.

S1, E1: Katara and Sokka, a brother and sister from the Southern Water Tribe, discover a twelve-year-old boy frozen in an iceberg. Katara wonders if this boy is the Avatar whom the world has been awaiting for a hundred years.