Avatar: The Last Airbender - Book 1: Water

Avatar: The Last Airbender - Book 1: Water, an American animated television series produced by Nickelodeon Studios. The title refers to the Avatar Cycle: water, earth, fire, and air. The season revolves around the protagonist Aang and his friends Katara and Sokka going on a journey to the North Pole to find a Waterbending master to teach Aang and Katara.