The Day of Black Sun

Part 1: On the day of the solar eclipse, the invasion begins. Hakoda returns with a ragtag team of several allies whom the group have met during their adventures. They successfully infiltrate the Fire Nation capital as the invasion force breaks through many security barriers. Upon reaching the Fire Lord's palace, the eclipse begins, but Aang finds no one home. Part 2: Sokka and Toph attempt to help Aang find the Fire Lord in time for the eclipse, but Azula stalls them and the eclipse passes before they can find him. Meanwhile, Zuko confronts his father and vows to help Aang defeat him. Ozai attempts to kill his son with lightning, but Zuko redirects it and escapes. Iroh frees himself from jail and disappears. The invasion force is captured, so Aang and his friends flee on Appa and retreat to the Western Air Temple for safety as Zuko follows on an air balloon.