Avatar: The Last Airbender Season 3 Episode 10 : The Day of Black Sun: The Invasion (1)
On the day of the solar eclipse, many of the characters from the previous episodes reunite with the gang to help them fight and the invasion begins. Hakoda returns with a ragtag team of several allies whom the group has met during their adventures. Aang finally kisses Katara, as he is worried that he may not return. They successfully infiltrate the Fire Nation capital as the invasion force breaks through many security barriers. Upon reaching the Firelord's palace, the eclipse begins, but Aang finds no one home.