Retrospective-Avatar: the Airbender Book 1, Chapter 19-The Siege of the North Part 1
This is a great episode. The coloration during the Zuko VS Katara fight is great, it was nice to see how she has improved, Zuko and Iroh get good moments (including the first mention of Lu Ten), and some advancement on the Sokka/Yue front. It also gave Yue a moment that made her far more human for me. (When she and Katara have a "Say what?" face.) Another great episode, though it doesn't quite compare to the next, and last of the season.