Oh man, what a dire episode S02E11 The Desert is! Abby leads this like, truly upsetting episode, where we see Katara struggle to keep things together, and see Aang being so unsure how to process his grief. It's also hilarious, with one of Sokka's most gif-able episodes, and Iroh forgetting he's part of an ancient secret society of helpful old people.
[Pod Sing Se is a spoilery weekly Avatar: The Last Airbender rewatch podcast hosted by Jen, Nicole, Steph, and Abby. This episode was edited by Jen.]