Having made it to the outer wall of Ba Sing Se, the kids confront a Fire Nation army that is driving a massive Fire Nation drill, which poses an imminent threat to the last Earth Kingdom stronghold. Meanwhile, Zuko and Iroh make crucial mistakes which begin to attract Jet's suspicions.
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 .