Avatar: The Last Airbender

Season 2, Episode 13

Episode Title: The Drill

Air Date: 2006-09-15

Overview:

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.