Avatar: The Last Airbender - Season 1 - Eps 17: The Northern Air Temple
When Aang and his friends hear rumors about surviving airbenders, they decide to stop by the Northern Air Temple on their way to the North Pole to see for themselves. What they find is a bunch of people who are not airbenders, but have mastered the art of gliding; though this upsets Aang because they have been defacing the temple. However, there was one part of the temple where nobody has been able to enter, and what Aang and his friends discover inside spells oncoming conflict.
About Avatar: The Last Airbender

Title: Avatar: The Last Airbender
First Air Date: 2005-02-21
Last Air Date: 2008-07-19
Status: Ended
Rating: 8.7/10 (from 4263 votes)
Language: EN
Seasons: 4
Total Episodes: 61
Network: Nickelodeon
Genres: Animation, Action & Adventure, Sci-Fi & Fantasy
Production Companies: Nickelodeon Animation Studio, JM Animation, DR Movie, Moi Animation, Nickelodeon Productions
Synopsis
In a war-torn world of elemental magic, a young boy reawakens to undertake a dangerous mystic quest to fulfill his destiny as the Avatar, and bring peace to the world.
Cast

Zach Tyler Eisen
Aang (voice)

Mae Whitman
Katara (voice)

Jack De Sena
Sokka (voice)

Dante Basco
Zuko (voice)

Jessie Flower
Toph Beifong (voice)

Greg Baldwin
Iroh (voice)

Dee Bradley Baker
Appa / Momo (voice)

Grey DeLisle
Azula (voice)

Cricket Leigh
Mai (voice)

Olivia Hack
Ty Lee (voice)