Olenna Tyrell (Diana Rigg)
Who: House Tyrell no longer has future, according to its matriarch, who fled King’s Landing before Cersei Lannister blew up the Great Sept killing most of House Tyrell, including Queen Magaery, Loras Tyrell, Mace Tyrell, in addition to the High Sparrow, Lancel Lannister, and Kevan Lannister.
Last seen: At the Water Gardens palace in Dorne, being offered vengeance by the Sand Snakes and, from visiting Lord Varys on behalf of the Mother of Dragons, “Fire and blood.”