: Samwell Tarly, working at the Citadel, discovers a map revealing a massive deposit of dragonglass beneath Dragonstone—the very material needed to kill White Walkers.
: In a cold open centered on revenge, Arya Stark uses her Faceless Man skills to impersonate Walder Frey. She poisons the remaining members of House Frey, declaring that "winter came for House Frey". got_7x01
: While traveling with the Brotherhood Without Banners, Sandor Clegane sees a vision of the White Walkers marching past a mountain that looks like an arrowhead. : Samwell Tarly, working at the Citadel, discovers