Will Jon Snow learn his true parentage?

Probably not, based on the answer above. At least not before, well, you know — unless this show is even freakier than I thought. But I imagine viewers, if not the man himself, will have it confirmed on screen Sunday that Jon is the son of Lyanna Stark and Rhaegar Targaryen — Dany’s brother, which makes Jon her nephew. (Oddly, that will be more than a year after HBO confirmed it online.) The revelation would complicate the burgeoning Fire and Ice romance in at least a couple of ways. The first is the whole incest thing, though that’s less of an issue in this world. (That said, it doesn’t seem like Jon and Dany’s style.) Potentially more tricky is that fact that, because 1) Rhaegar was next in line for the Iron Throne behind his father, the Mad King, and 2) we learned two weeks ago that Jon’s parents were married when they had him — meaning the long-suffering bastard has actually been legitimate the whole time — Jon, not Daenerys, would be the rightful heir to the throne. So at some point their pillow talk will probably get pretty tense, at least.

Will Cersei join the fight against the White Walkers?

You’ll recall that last week’s wight fight came about thanks to a plan to capture one of the undead to bring back to Cersei, in order to convince her to join the coalition of the living against the army of death. It was a plot point that roughly zero percent of viewers found credible but here we are, and with Sunday’s summit in King’s Landing, glimpsed in the episode trailer, we’ll learn if the gambit worked. A fun side result: Many long-separated characters could reunite at the meeting, including Tyrion and Cersei, Tyrion and Podrick, Brienne and Jaime, and the Hound and his reanimated brother, the Mountain. (Which by the way, clearly Cersei already knows that zombies exist, but a Qyburn science project is conceptually different from thousands of annihilating ghouls from beyond the Wall.)