In King's Landing, the Unsullied, led by a grim-faced Grey Worm, line up in tight formation outside the walls of King's Landing. On the walls, Jaime Lannister and Bronn discuss how the latter is unnerved by the idea of soldiers without genitalia, as he's been around enough soldiers to know why they fight, and the idea that of soldiers who fight for no promise of sex is alien to him. As they talk, hordes of Dothraki ride in, a stark contrast to the disiplined Unsullied; but the two ancient enemies are united in cause today.
Little Waiting Time...
At the harbor, Tyrion Lannister, Varys, Missandei, Jon Snow and Davos Seaworth nervously sail past Euron Greyjoy's fleet. Sandor Clegane goes belowdecks to check on their "guest", who is thankfully just as riled up as ever.
The group arrives and are escorted to the Dragonpit, the location of the summit. Tyrion reconnects with Bronn, who concedes it is good to see him again. The pair greet Podrick Payne, who had arrived earlier with Brienne of Tarth. As Pod goes off with Bronn, Brienne hangs back to talk with Sandor. She tells him that Arya doesn't need looking out for anymore, which seems to bring a smile to his face.
At the Dragonpit, the various factions meet: Cersei Lannister, Jaime, Qyburn and Euron in the middle, Jon, Davos and Brienne to the left, and Daenerys's court to the right. When Cersei demands to know where her rival is, the Dragon Queen makes a suitably dramatic entrance on Drogon's back, with Rhaegal flying overhead. Sandor, for the first time in years, comes face-to-helmet with his brother, and wonders what exactly has happened to him, before leaving to retrieve the wight.
Sandor returns with the crate containing the wight, which is worryingly silent. Clegane gets the crate open, but there is still no movement. He finally gives the crate a massive kick, which prompts the wight to launch itself out and race toward the nearest target - Cersei, appropriately enough. Visibly horrified, the Lannister queen recoils in shock as Sandor manages to slice the creature in half. The assembled look on in shock as the wights upper half still moves around trying to kill something. Jon steps forward and picks up the wight's discarded hand, using a torch provided by Davos to demonstrate how fire can be used to stop them. He then uses a dragonglass dagger to the head to end the wight's upper half. Euron asks of the wights can swim; at Jon's negative assertion, Euron declares that he has been over the whole world and has never been terrified until now. He tells Daenerys to retreat to her islands while he returns to his, and to come find him when they are the last factions left alive.
Seemingly convinced, Cersei immediately offers terms: satisfied that Daenerys is concerned with the Army of the Dead, Cersei will not move her troops, but will guarantee that they will not hinder the Targaryen or Northern forces in any way during the battle against the White Walkers. She refuses to deal with Daenerys at all, however, and calls on Jon Snow, as King in the North and Ned Stark's son, to keep the truce and keep both Cersei and Daenerys in line.
Jon thanks Cersei for the compliment, but says that he cannot serve two queens - and reveals to all assembled that he has already declared for Daenerys, infuriating all three Lannisters present. Declaring that there will be no truce if it is just her and Daenerys, Cersei storms out. Desperate, Brienne grabs Jaime and begs him to reconsider, as what they've seen goes beyond family, Houses, and thrones. Jaime doesn't disagree, but walks away.
Meanwhile, Dany and Tyrion (who never knew about Jon's change of heart in the first place) rip into Jon over his ill-advised action, suggesting that learning to lie just a little might be a good skill. Tyrion reluctantly decides that he will go treat with Cersei alone. Dany protests, but Tyrion insists and bids them wait.
In the Red Keep, Tyrion, escorted by Ser Gregor, meets Jaime, who confirms that he believes the threat of the Dead, but has been unable to convince Cersei. Tyrion enters Cersei's office, and the two trade savage barbs. Tyrion finally screams that he loved Myrcella Baratheon and Tommen Baratheon almost as much as Cersei and that he regrets what happened to them, and that if Cersei genuinely blamed him for their deaths, then Gregor should just kill him right then and there. A tense moment passes... in which Cersei does not give the order. Relieved, Tyrion heads straight for the wine. They continue their discussion until Tyrion realizes that Cersei is pregnant.
Back at the Dragonpit, Daenerys and Jon discuss the dragons and how her ancestors caged them, become less impressive as the power of the dragons waned. Jon questions Daenerys's assertion of infertility, particularly when she admits that she never got an opinion about her condition from anyone except Mirri Maz Duur. Their conversation is interrupted by the return of all three Lannisters. Cersei has agreed to work with Daenerys, but not by keeping her troops back: the Lannister army will march north to fight alongside the Starks and Targaryens.
After the enemy delegation has left, an eager and relieved Jaime meets with his commanders to discuss the logistics of moving the army north. Cersei enters the map room and asks what he is doing. Dismissing the commanders, she tells Jaime he really is the stupidest Lannister. Shocked, Jaime listens as Cersei explains that Euron has not abandoned her, but has gone to Essos to ferry the Golden Company back to Westeros. She intentioanlly leaked her pregnancy to Tyrion so he would believe her, and now she intends to allow their enemies to exhaust themselves against the Army of the Dead, then have the Golden Company clean up what's left of whoever wins in the North. Jaime has finally had enough and declares that he, at least, will fight with the honor he has left. When he tries to leave, he finds his way blocked by the Mountain. Furious beyond words, Jaime tells Cersei that he is leaving and if she can't handle that, then she should have the Mountain kill him. After another tense moment, Cersei again doesn't give the order.
Alone, Jaime rides out of King's Landing. Realizing how conspicuous he is, he nervously pulls a glove over his golden hand. Surprised by the sudden appearance of a drop of water on the glove, Jaime looks up... and sees a blanket of snow descending upon King's Landing. As Jaime rides away, the snow begins to cover the houses, the streets, and even Cersei's map in the Red Keep.
Winter has come at last to the south.
At Winterfell, Sansa Stark discusses the potential threat of her sister Arya Stark with Petyr Baelish. Baelish tries to manipulate her as usual, encouraging her to think as he does and ask herself what Arya's worst possible motivation is. Seemingly overcome with horror at the thought that Arya would want to take her face and reign as Lady of Winterfell, it seems that Sansa decides to do something about it, to Baelish's quiet delight.
After a long time reflecting on her course of action on the battlements, Sansa orders Arya be brought to the great hall. In the Hall, Sansa and Bran are seated at the great table, the hall lined with soldiers and a few key lords such as Yohn Royce and, of course, Baelish. Arya is brought in and asks sardonically if the soldiers are necessary. Sansa says they are, and them proceeds to rattle off a list of crimes perpetuated against House Stark... and asks Baelish how he intends to answer the charges. Thrown, Littlefinger tries to figure out what is going on. Sansa uses his own words against him and accuses him (quite correctly) of orchestrating the conflict between the Starks and the Lannisters that has ultimately engulfed the Seven Kingdoms for the better part of the last decade, including the betrayal and death of her father Eddard Stark. Baelish tries to deny this, but Bran uses his Greensight to recall the exact words Baelish said as he held the knife to Ned's throat. Swiftly realizing that he has lost control of the situation and the trial is just a drumhead, Baelish demands that Lord Royce take him, as Lord Protector of the Vale to safety; Bronze Yohn flatly refuses. In desperation, Baelish pleads for his life, insisting yet again how much he loved Cat and how much he now loves Sansa. But the Lady of Winterfell sentences him to death. A delighted Arya carries out the sentence, reaching in and easily slitting Littlefinger's throat with the same Valyrian steel dagger that lay at the heart of his plots.
On the battlements, Sansa and Arya discuss Littlefinger's plots and how much they have changed. Arya admits that she wouldn't have been able to survive what Sansa did, although her sister disagrees, saying Arya is the strongest person she knows. The sisters muse on another of their father's stories, about how lone wolves die in the winter, but wolf packs survive, and realize the truth of his words as the Starks have at last been reunited.
Some time later, Samwell Tarly and Gilly arrive at Winterfell. Upon hearing that Bran is back, Sam calls on him, recalling their meeting at the Nightfort some years earlier. Bran is glad to see Sam, but is surprised to find him here. When Sam reiterates his loyalty to Jon, Bran, unable to keep it a secret any longer, reveals the truth of Jon's origins: he was born to Rhaegar Targaryen and Lyanna Stark at a Tower in Dorne, and is not a Snow at all, but a Sand. Sam realizes that that isn't true either, recalling the entry from High Septon Maynard's private journal about annulling Rhaegar's marriage. Bran expressed his doubts, but Sam reiterates the private nature of the journal and encourages Bran to use Greensight to confirm it. To his own surprise, Bran easily finds the wedding, where he sees a clearly happy Lyanna wedding Rhaegar in a Faith of the Seven ceremony before a Heart tree. Jumping forward to the Tower of Joy, Bran finally hears Lyanna's dying words. Now piecing the truth together, Bran declares that Rhaegar never raped Lyanna. She loved him and ran off with him, and bore him a son: Aegon Targaryen.
In The Narrow Sea, in the Chamber of the Painted Table, Daenerys and her court discuss logistics. It will take the Dothraki a fortnight to reach Winterfell, and the plan is to have Jon and the Unsullied cross the sea by ship and meet them at White Harbor. Jorah Mormont points out that the North is not really safer for her than anywhere else, as someone with a memory of Robert's Rebellion and an idea of becoming a hero could easily take her out with a single crossbow bolt. He suggests she fly to Winterfell to avoid any potential unpleasantness. Jon counters that Daenerys ride with them so that the North can see her as a liberator and ally. After a moment's consideration, Dany decides to go with him on the road. Jorah, suspecting a different reason for her decision, throws her a look, which she notices but avoids.
Some time after setting sail, Jon knocks on the door of Daenerys's cabin. She answers and meets his gaze without words. After a moment, he enters, and, with their eyes still locked, shuts the door. Unaware of the truth of Jon's past, they finally give into the burgeoning passion between them.
Unknown to both of them, Tyrion had also been on his way to speak with his queen, and had seen Jon enter the cabin. Silently devastated that Daenerys has made another mistake, Tyrion walks away.
At The Wall, Tormund and Beric Dondarrion review the defenses atop the Wall at Eastwatch-by-the-Sea. Tormund remarks that the crows say he'll get used to the height, but he admits it'll probably be a while. Suddenly, the pair see movement at the edge of the Haunted Forest. A white walker emerges atop an undead horse, followed shortly by a horde of wights. More and more white walkers emerge as the Night Watch's horns sound their alarm.
Suddenly, the undead Viserion swoops down, the Night King astride his back. With a burst of sinister blue flame, Viserion demolishes the scouting platforms atop the Wall... and them turns his flames against the Wall itself. The Night's Watch and the Wildlings desperately try to evacuate as ice melts and rock crumbles. Tormund and Beric manage to make it farther west along the Wall itself before the entire eastern extremity of the Wall collapses... leaving plenty of space between the Wall and the sea for the Army of the Dead to cross. A road now open to them, the White Walkers direct the wights into the North.
THE GREAT WAR HAS BEGUN.
In King's Landing a grand meeting takes place. Theon makes amends and rescue plans. Sansa punishes those who wronged her family. Jamie confronts Cersei. The complete truth of Jon's lineage is revealed. The army of the dead reaches the Wall.
PETER DINKLAGE ( Tyrion Lannister )
KIT HARINGTON ( Jon Snow )
AIDAN GILLEN ( Peter Baelish )
LENA HEADEY ( Cersei Lannister )
EMILIA CLARKE ( Daenerys Targaryen )