List of Avatar: The Last Airbender episodes

This is a list of episodes for the animated television series Avatar: The Last Airbender. The series premiered on February 21, 2005 and has aired through its second season. Notable merchandise based on the series include nine DVD sets of episodes, six-inch scale action figures, a video game, stuffed animals distributed by Paramount Parks and two Lego sets.

The series classifies each season as a "book" and each episode as a "chapter." The list is ordered by release date which, with the exception of "Appa's Lost Days", also adheres to the show's continuity.

Book One: Water
The first two chapters comprise the series premiere. The final two chapters comprise the season finale. The original pilot episode was never aired, but can be seen on the Complete Book 1 Collection's sixth disc.

Book Two: Earth
The first chapter comprises the season premiere. The final two chapters comprise the season finale.

Book Three: Fire
The first chapter comprises the season premiere. The final four chapters comprise the season finale.

Online downloads
Both Books are available through the iTunes music store, BitTorrent, and Xbox Live Marketplace with new ones usually released one day after they premiere on Nickelodeon. It currently has "The Serpent's Pass" and "The Drill" combined into The Secret of the Fire Nation. The episodes "The Guru" and "The Crossroads of Destiny" are also combined.

Book One: Water
Book 1: Water, Volume 1, containing the first four episodes and the making-of special, was released on January 31, 2006 by Paramount Home Entertainment. The remaining episodes were also put into their own separate DVDs and sold seperatly for a total of five DVDs. The Complete Book 1 Collection was released September 18, 2006 and contains all episodes of Book One: Water on a six disc set with all-new special features on the sixth disc.

Book Two: Earth
Book 2: Earth, Volume 1, containing the first five episodes of the second season, was released on January 23, 2007 by Paramount Home Entertainment. The remaining episodes are to be placed on DVDs in divisions of five and sold separately for a total of four DVDs, followed by a boxed set in a similar fashion to the first season. Each of the individual season two DVDs also come complete with an exclusive comic book.

Book Three: Fire
Book 3: Fire, Volume 1, containing the first 5 episodes of the third season was released on October 30, 2007 by Paramount Home Entertainment.