The western air temple was about zuko switching sides and joining aang to teach him firebending but katarra,sokka,toph,and aang dont accept him at first but then at the end aang is all like i think you are supposed to be my firebending teacher.
Well yeah what the other person said! It's about the awatara gang going to the westurn air temple after the invasion plan failed. So Zuko follows them and asks to sumali there group. They say yes but Katara isn't sure cos she knows he has had a hard time doing the right thing. But if that wasn't any help then you can just go to the awatara portal and then you can watch episodes there!