Avatar: The Last Airbender (Avatar: Son Havabükücü) 2. Sezon 13. Bölüm (The Drill)

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.