Meanwhile, Zuko--following his extended banishment from the Fire Nation--discovers that his father welcoming again, but only because his manipulative sister, Princess Azula, has falsely told everyone that Zuko killed Aang. Fearing that his father will disown him again, Zuko chooses not to tell the truth and works on having Aang quietly assassinated. Where Zuko had been more of a complete human being during his exile, he’s back to being a monster again, going so far as to keep his dutiful uncle, Iroh, in a dark, dank prison. --Tom Keogh

Book 3: Fire, Vol. 2 Avatar the Last Airbender: Book 3--Fire, Volume 2 finds the series closing in on a long-awaited day of reckoning with the fire nation. The five episodes on this disc continue those chapters on Volume 1 in which Aang--the young avatar--and his companions Katara, Toph, and Sokka live undercover in the fire nation, awaiting the moment when an alliance of warriors from the air, water, and earth nations converge to overtake the conquering firebenders once and for all. On Volume 2, the path to the day of battle, in typical Avatar fashion, is full of misadventures and intrigue, but also sundry revelations that make the pending series climax that much more interesting. "The Avatar and the Firelord" is the backstory of how the fire nation leader came to be a brutal tyrant in the world. Turns out he was the best friend of none other than the previous avatar; the souring of their relationship led to the troubles young Aang is trying to resolve. (While Aang is finding all this out, the fire nation’s Prince Zuko discovers his ancestry is more complicated than he’d imagined, and that he has more of a role to play in ending the war waged by his people.) "The Runaway" is a comedy about mischievous Toph getting into trouble for using her earthbending powers to win bets and make a lot of money. "The Puppetmaster" is a scary story featuring a waterbending old woman who initially enchants Katara, but then later is revealed to be a vengeful monster with terrifying abilities to control people’s bodies. "Nightmares and Daydreams" concerns an anxious Aang unable to sleep and stop hallucinating prior to the coming battle, while part one of "The Day of Black Sun" sees the beginning of the allies’ invasion of the fire nation. Lots of surprises in this last episode, with a cliffhanger ending that makes the next volume of Avatar most desirable. --Tom Keogh

Book 3: Fire, Vol. 3 At the beginning of Avatar the Last Airbender: Book 3 Fire, Vol. 3, things don't go quite the way one would have hoped at the end of Vol. 2. Aang--the young avatar--and his companions Katara, Toph, and Sokka were part of a major assault on the tyrannical fire nation, and hopes of victory were high. In "The Day of Black Sun, Part 2: The Eclipse," however, circumstances reverse the heroes' fortunes, forcing Aang, his friends and the very youngest warriors to flee the battle. As they regroup at the Western Air Temple, mourning the expected imprisonment of the adults left behind, Aang comes face to face with an unexpected, would-be ally: Zuko, prince of the fire nation. Sokka and Katara refuse to accept Zuko's guarantee that he is truly on their side (they've been through this before), but Toph and Aang are a little more receptive to the idea. Good thing. In "The Firebending Masters," Aang accepts that Zuko could be the firebending mentor he needs to show him how to conquer the most elusive of the four elements. But it isn't easy: Zuko loses his power and must retreat to a fire nation temple, where he can learn the origins of his native gift. The set of five stories on this disc concludes with the two-part "The Boiling Rock," in which Sokka and Zuko infiltrate a fire nation maximum security prison in hopes of freeing Sokka's father. Trying hard to stay clandestine, Zuko's identity is revealed anyway, jeopardizing not only the mission but Zuko and Sokka's very freedom. The excitement is endless in the long-running Avatar series, and developments (especially Zuko's acceptance by Aang and the others) are as heartening as they are surprising. --Tom Keogh

Book 3: Fire, Vol. 4 The long-running series Avatar the Last Airbender comes to a dazzling conclusion in Book 3 Fire, Volume 4. Poised for quite a number of episodes (seen in previous volumes) to go to war against the tyrannical Fire Nation, Aang the young Avatar and his cohorts must now bring down the Fire Lord and his army, or watch them ramp up their destructive powers during an imminent solar eclipse. But there's a lingering question only Aang can answer: can the Avatar, who has never killed anyone, bring himself to take the Fire Lord's life? That is what he must do, according to Zuko, the Fire Prince who has thrown in his lot with Aang and the latter's friends.

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