15. Cersei Blows Up King's Landing
Season 6, Episode 10: "The Winds of Winter"
Today, Cersei Lannister settled all family business. After a season and a half suffering losses courtesy of her enemies – from political rivals in the rich, popular House Tyrell to the fanatical followers of the religious fundamentalist the High Sparrow – the Queen Mother put the mother of all W's in the win column. With the help of her mad-scientist right-hand-man Qyburn, she blew up a cache of wildfire under the Great Sept of Baelor during the trial of Margaery and Loras Tyrell, killing both them and their captor in one gigantic green explosion. Sure, it cost her the life of her son King Tommen as well, since he killed himself after realizing his wife Marge had been murdered. But that's a small price to pay for the Iron Throne, isn't it?