The musical scores and the fighting have pretty much made me love this episode. But not as much as the first two parts.
Azula has begun her descent into madness. She's dropping the banhammer left and right. She is trusting of no one. Zuko and Katara set off to fight her. But she only challenges Zuko. Because of his stupidity and baiting her (guess he hasn't changed too much) she launches lightning. At Katara.
Zuko dives in the way.
While the comet arrives. Aang is waiting for Ozai where Giant LionTurtle Island left him. Ozai arrives. And apparently everyone is ripped in the Fire Nation. Ozai is seeming to get the upper hand. With his super comet powers. Aang at first offers to resolve things without fighting. Doesn't work. Who thought it would? Apparently Aang.
Sokka, Suki, and Toph take out the air ships. A lot of things going on, rather hard to follow in the first sitting. But very actiony, very intense.