Contains spoilers for this episode and earlier episodes.
Arya learns that the pool in the House of Black and White offers death to those who drink from it. Jaqen demands that she abandon Arya Stark's possessions, so she discards her clothes but hides Needle instead of throwing it away. In King's Landing, Tommen marries Margaery, whose influence makes Cersei fear being sent home. Cersei meets the High Sparrow after his followers humiliate the High Septon and chooses to imprison the older religious leader.
Littlefinger tells Sansa that she is to marry Ramsay Bolton. Horrified by an alliance with the family that murdered Robb and Catelyn, she nevertheless agrees after he presents the return to Winterfell as a chance for revenge. Brienne and Podrick continue following her north. In Volantis, Tyrion and Varys hear a red priestess speak of Daenerys. Tyrion visits a brothel, where Jorah kidnaps him and announces that he is taking him to the queen.
Jon declines Stannis's offer to become a Stark and begins exercising his authority as Lord Commander. He gives Alliser Thorne the position of First Ranger and orders Janos Slynt to restore Greyguard. Slynt openly refuses the assignment and insults him. Jon has him brought outside for execution. Slynt finally begs for mercy, admitting his fear, but Jon carries out the sentence. From across the courtyard, Stannis acknowledges the decision with a nod.