Avatar: The Last Airbender Book Three: Fire -

: A high-stakes assault on the Fire Nation Capital during the "Day of Black Sun" ultimately fails, forcing the team into hiding at the Western Air Temple.

: Aang must master firebending before Sozin’s Comet arrives, which will grant the Fire Nation enough power to burn the world to the ground. Avatar: The Last Airbender Book Three: Fire

The season follows Team Avatar as they go undercover within the Fire Nation to prepare for an invasion during a solar eclipse. : A high-stakes assault on the Fire Nation

: After initially returning home as a hero, Zuko realizes his father's cruelty, defects from the Fire Nation, and joins Team Avatar as Aang's firebending teacher. ⚡ Key Character Arcs Zuko realizes his father's cruelty