Episode 40 - "The Crossroads of Destiny" (220)

[zuko614]

A coup is staged in Ba Sing Se by Azula and the Dai Li now under her control. In the climax of the plan the Earth Kingdom falls, Aang is critically injured and Zuko betrays his uncle. The group escapes along with the Earth King and Bosco but must now form their battle plans from scratch.

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The best battle ever. Zuko chooses evil. great zutara moment.
and zuko/azula vs. aang/katara was awesome
and my mouth literally dropped at the end

[Kiara]

I think this is one of my all time favorite battles, there was so much action and amazing bending and drama. I actually hated Zuko at the end of this episode lol

[zuko614]

I loved it. He chose evil yaaaay
I remember I saw one clip with katara crying taken out of context, and when I say that and the way the episode was progessing, I thought zuko might die saving aang. I was worried for a few minutes.