Contains spoilers for this episode and earlier episodes.
The Hound faces Beric Dondarrion's flaming sword in trial by combat and kills him, winning his freedom. Thoros then brings Beric back to life, leaving Arya to confront a man who has survived death six times. Gendry tells her he wants to remain with the Brotherhood as a smith. At Riverrun, Karstark murders the captive Lannister boys in revenge for his own sons. Robb rejects pleas to spare him and carries out the execution himself. The Karstark troops abandon his army, forcing Robb to seek Frey support for a new attack on Casterly Rock.
Jaime and Brienne reach Harrenhal, where Qyburn treats Jaime's injured arm. In the baths, Jaime tells Brienne that Aerys planned to burn King's Landing with wildfire and ordered him to bring back Tywin's head. He says that killing the king prevented the city's destruction, then collapses as Brienne supports him. Jon gives the wildlings information about the Watch's forts but exaggerates Castle Black's strength. Ygritte draws him into a cave, where they sleep together. At Dragonstone, Shireen visits Davos in prison and begins teaching him to read. Daenerys learns that the Unsullied have chosen Grey Worm as their leader. In King's Landing, Tywin blocks the proposed Sansa-Loras match by ordering Tyrion to marry Sansa and Cersei to marry Loras, overruling both his children.