- After Zuko is severely injured by a shot of lightning from Azula during their Agni Kai, Katara must face her alone. Sokka and Toph are separated from Suki while attempting to destroy the air fleet, and soon find themselves outnumbered. Meanwhile, fighting a losing battle against Ozai, Aang enters More
- First Aired: July 19, 2008 - 24 Minutes Runtime
- Zach Tyler, Mae Whitman, Jack De Sena, Jessie Flower
Watch Avatar: The Last Airbender Season 3 Episode 21 - Sozin's Comet, Part 4: Avatar Aang
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Watch Avatar: The Last Airbender s3e21 Now
Also starring Mae Whitman
Also starring Zach Tyler
Watch Avatar: The Last Airbender - Sozin's Comet, Part 4: Avatar Aang (s3 e21) Online - Watch online anytime: Buy, Rent
Avatar: The Last Airbender, Season 3 Episode 21, is available to watch and stream on Nickelodeon. You can also buy, rent Avatar: The Last Airbender on demand at Amazon online.