Contains spoilers for this episode and earlier episodes.
Grey Worm leads Unsullied into Meereen through the sewers and gives weapons to the slaves. Their uprising brings the city under Daenerys's control. Barristan advises mercy, but Daenerys orders 163 masters crucified in answer to the children left along the road. In King's Landing, Jaime visits Tyrion in his cell and hears his denial of the murder. Jaime later gives Brienne his Valyrian steel sword, armor and Podrick as a squire, sending her to find and protect Sansa.
Brienne names the sword Oathkeeper. Olenna tells Margaery that she would not have allowed her to marry Joffrey, implying her involvement in his death, and advises her to approach Tommen. Margaery visits the young king's bedroom and discusses their possible marriage. On Littlefinger's ship, Sansa learns that a missing stone from her necklace contained the poison. Littlefinger explains that the murder served him and his new allies, and says he plans to marry Lysa Arryn.
At Castle Black, Thorne permits Jon to lead volunteers against the mutineers, hoping the mission will remove a rival. Locke joins the party. At Craster's Keep, Karl orders Rast to abandon Craster's last son outside for the White Walkers. Bran enters Summer's mind to investigate the baby's cries, but the direwolf is trapped. The mutineers capture Bran and his companions when they try to rescue the wolves. A White Walker carries the baby far north, where another icy figure touches its cheek and turns its eyes blue.