When Aang and his friends find a professor who knows of a library that contains information about the world, Sokka decides to go there to hopefully find some information to use against the Fire Nation. The library is guarded by the knowledge spirit, Wan Shi Tong, who doesn't welcome humans into his library, because he believes they only seek information for evil purposes. When Wan Shi Tong discovers Sokka wasn't being truthful with him, he begins to sink the library, bringing the kids down with it. Will everyone be able to escape the library in time? And who are the strange benders who have kidnapped Appa?
Elenco: Zach Tyler , Dante Basco , Mae Whitman , Jack De Sena , Jessie Flower , Dee Bradley Baker , Mark Hamill , Grey DeLisle , Jennie Kwan , Cricket Leigh , Olivia Hack , André Sogliuzzo , Melendy Britt , Mitchel Musso , Olivia Hack .