Cersei appoints Ser Gregor Clegane, the Mountain, as the champion for the prosecution in Tyrion's upcoming trial by combat. Jaime and Bronn decline to fight the Mountain for Tyrion, but he finds an unlikely ally in Oberyn, who accepts, seeking to avenge his sister Elia's rape and murder by the Mountain during Robert's Rebellion. Daenerys takes Daario as her lover, then allows him to do what he does best, sending him to handle the resurgent slavers in Yunkai. Melisandre and Selyse prepare to depart Dragonstone, intending to take Shireen with them. As the Wildlings approach Castle Black, Jon's warnings about the Wall's vulnerability fall on deaf ears, with Alliser Thorne rejecting his suggestion to seal the tunnel.
On the road with Pod, Brienne follows a new lead: at an inn they meet Hot Pie, who updates them about Arya, and they resolve to travel to the Vale, deducing she would seek shelter with her aunt. In the Vale, Lysa witnesses Littlefinger kissing Sansa and, enraged, threatens to throw Sansa through the Moon Door, a circular opening in the floor with a steep drop to the rocks below; Littlefinger intervenes and, after admitting to Lysa that he always loved her sister Catelyn rather than her, shoves Lysa to her death.