Thrones returned to 3.9 million viewers. That’s up a massive 74 percent from its series debut last year. It also greatly improves upon the show’s previous all-time high, which was just over 3 million viewers. Including all three Sunday airings, the show delivered 6.3 million viewers. The numbers mean a third season renewal is pretty much guaranteed (and also dissolves any concerns that last season’s killing of popular characters would result in a dip).