My major prediction after that episode:
- Sansa happily lets Jon lead an expedition to Eastwatch By The Sea to tackle the Night King, after the Brotherhood Without Banners arrive with a warning of the visions they've seen, in the hope he dies and she can take Winterfell. He doesn't die but faces a long fight back to Winterfell with most of the Brotherhood Without Banners meeting a glorious death in battle in the process.
- Littlefinger sees this as his mind games having worked and makes his move on Sansa, which results in her very quickly telling him to boil his head.
- Littlefinger retreats with his men and declares for the Lannisters and cuts Jon Snow and Co. off from the South, leaving the North to face the Night King and his merry men on their own.
- Towards the end of the series, the Night King sends an army of Wights to Eastwatch By The Sea as a deception plan, while he launches an attack on the Wall which brings it down.
- Jon manages to make his way to Dragonstone and begs Dany for dragonglass, with his case helped by the newly arrived Melisandre. Dany gets a whiff of dragon off him, sexual tension follows and she offers him aid.
- They return to the North to do battle, with Jon possibly riding one of the dragons given his Targ lineage and at some stage, one of Danys dragons will be killed and the Night King will bring it back as an undead bastard of a dragon. Season end.
And so the North was lost...