ok guys, 316 IS NOT THE NINJA MISSION!!!!!!!!!!!!!!!!!!!! It is supposed to be about Katara and Sokka's father telling them about their mother. If that is true, there's no possible way that its the Ninja mission, there wouldn't be enough time for that. okay? There are SOOOO many screenshots from that mission, too many and not enough time.
I'm thinking the balloon part- where azula and zuko fall is definitely in 316, probably at the end- seeing as it appears to seperate the main gang(including Sukki and Zuko) from the father and the duke and them, seeing as they are not in the Ember Island Players, but I believe that the ninja part is definitely part of the 4 part finale. Trust me, I wish it was coming up really soon and had its own episode too but it doesnt, okay.