[sdrinf]

| There are two episodes that will always make me at least tear up

Tales of Ba Sing Se & Sozin's Comet, Part 2: The Old Masters? ;)

[menesss]

edit: no you are right, The Old Masters gets me too. I just rewatched it and :'(

Half right! "Tales of Ba Sing Se" and the very next episode "Appa's Lost Days", which apparently won a Genesis Award for Outstanding Children's Programming [0].

[0]: https://m.imdb.com/event/ev0000274/2007/1