Episode Title:
The Day of Black Sun Part 1 / The Day of Black Sun Part 2.
Episode Description:
The Day of Black Sun Part 1: The Invasion: On the day of the solar eclipse, many allies featured in previous episodes reunite with Team Avatar to a launch the planned invasion of the Fire Nation, lead by Hakoda. Aang finally kisses Katara as sign of his strong feelings for her, worried that he may not return. Relying on several forms of bending and aquatic vehicles designed by Sokka, engineered and constructed by the Machinist, and propelled by waterbending, the invasion forces successfully circumvent several layers of Fire Nation defenses and infiltrate the capital, where they begin a grueling assault towards the palace under constant onslaught from Fire Nation forces. Aang reaches the Firelord's palace, only to find out that no one is present.
The Day of Black Sun Part 2: The Eclipse: As the eclipse begins, Sokka, Aang, and Toph search for the Firelord, but only find Azula, and give chase to her. Realizing that she is merely delaying them, Sokka initially attempts to stop the chase, but Azula provokes him by telling him of Suki's capture. Elsewhere, Zuko confronts his father, finally recognizing Ozai's treatment of him as abusive. He tells Ozai that he will join forces with the Avatar. As he begins to leave, Ozai stalls him by revealing that Zuko's mother was banished after, in order to save Zuko's life, she helped Ozai seize the throne by assassinating his father, Firelord Azulon. As Ozai finishes the tale, the eclipse ends and he attacks. Zuko redirects Ozai's lightning back at him, using the technique taught to him by Iroh, and leaves, intent on freeing his uncle. However, Iroh has already escaped from prison before Zuko can join him. The exhausted and diminished invasion force has no choice but to surrender and be captured, but at the urging of his allies, Aang flees with his friends to the Western Air Temple. Zuko follows them in a stolen war balloon.
