Avatar: The Last Airbender (also known as Avatar: The Legend of Aang in several countries) is an American animated television series that currently airs on the Nickelodeon television network. Set in an Asian-influenced world of martia  arts and elemental magic, the series follows the adventures of the latest of a long line of Avatars, Aang, and his friends in their quest to save the world from the ruthless Fire Nation. The series is written in the form of a book series, with each episode serving as a "chapter" and each individual season as a "book."

Originally slated to begin airing November 2004, Avatar: The Last Airbender debuted on TV on February 21, 2005. The show is also available on DVD or for download at the iTunes Store, Xbox Live Marketplace and BitTorrent.^[1] Michael Dante DiMartino and Bryan Konietzko are the creators and executive producers of the series. The show receives high ratings in the Nicktoons lineup, even outside its intended 6-to-11-year-old demographic. Avatar: The Last Airbender is popular with both audiences and critics,^[2] garnering 4.4 million viewers on its best-rated showing.^[3]

The series' success prompted Nickelodeon to order a second season,^[4] and a third season has been announced for 2007.^[5] Merchandise based on the series includes six DVD sets of episodes, six-inch (15.34 cm) scale action figures, a trading card game, a video game, stuffed animals distributed by Paramoun  Parks, and two Lego sets.^[6]