Both Aang and Zuko must learn the history of how the war began. Zuko learns a secret about his great-grandfather's past.

Cast: Zach Tyler, Mae Whitman, Jack De Sena, Jessie Flower, Dante Basco, Dee Bradley Baker, Greg Baldwin, Andrew Caldwell, Grey DeLisle, James Garrett, Lex Lang, Sean Marquette, Jeff Patterson, Ron Perlman, Sab Shimono