Avatar: The Last Airbender Season 3 Episode 13 : The Firebending Masters

Zuko prepares to teach Aang Firebending, but for unknown reasons can't Firebend. He and Aang travel to the temples of the extinct Sun Warriors to learn about the ancient origin of Firebending. Zuko reveals to Aang that his grandfather caused the extinction of the dragons, the original Firebenders. After discovering the Sun Warrior culture still exists, Zuko and Aang are sent to see the Firebending Masters, later revealed to be the two last surviv...