While Aang is sorting that out--receiving various wisdoms from past Avatars and advice from a giant turtle-lion creature--Zuko and Katara take another leg of the battle by confronting Zuko's crazed sister. Meanwhile, Sokka re-asserts his latent talent for commanding dangerous missions as he and earth-bender Toph attempt to sabotage Fire Nation airships. The final episodes on this disc are thrilling, in no small part because they have been so long in arriving. Before those, however, there are a couple of interesting chapters to get through, including "The Southern Raiders," in which Katara attempts to exact revenge for the disappearance of her mother. As always, there's some comic relief, in this case "The Ember Island Players," in which our heroes experience the ignominy of watching some of their previous adventures become a ridiculous, staged play. --Tom Keogh