Avatar: The Last Airbender is an American animated television series that aired for three seasons on Nickelodeon from 2005 to 2008. It is set in a world where some humans can manipulate the classical elements through bending arts. The story follows Aang, the last surviving Airbender and Avatar, and his friends Katara and Sokka who must master the bending arts and bring peace to the world by defeating the Fire Nation. Over the course of the series, Aang learns waterbending, earthbending, and firebending to fulfill his duty as the Avatar.