Almost all the major players converge on the dragon pit to negotiate an armistice. The hound opens up the wight's crate, who is shy at first, then lunges for Cersei's face.  Euron pretends to bow out, and Cersei says she'll agree to help defeat the Night King if Jon promises to keep the North out of the eventual war for the Iron Throne.  Jon cannot tell a lie and says he's already bent the knee to Daenerys.  Cersei says fuck you then and storms off.  Tyrion risks his life by visiting Cersei on his own, and sensing she is pregnant, believes this will compel her to save the realm for her child's future.  They return the the Dragon Pit and she seems to agree to the armistice.  But she soon tells Jaime that was bullshit.  Jamie walks out on her and rides North on his own to join the good guys.  Theon manages to rally some fickle Iron Islanders into mounting a rescue of Yara.  At Winterfell Sansa and Arya reveal all the brewing tension between them was part of a trap for Littlefinger.  The trap is sprung, Sansa throws all his bullshit back in his face and Arya slices his throat with his Valyrian steel dagger.  He dies grovelling in front of all the gathered lords and knights.  Sam arrives at Winterfell, compares notes with Bran and they realize Jon Snow is actually Aegon Targaryen, the rightful heir to the Iron Throne.  This plays out in a montage of Jon and Dany getting it on.  At Eastwatch the Night King breaches the wall with super dragon-wight breath, allowing the Army of the Dead to march south.