VIDEO : A ?Game Of Thrones? Actor Chimes In On Theory

As the final episodes of HBO's "Game of Thrones" draws nearer, fans are circulating theories online about who might live and who might die. On such theory is that Jamie Lannister kills his sister, Cersei, to protect the seven kingdoms. The actor who plays Jamie, Nikolaj Coster-Waldau, recently chimed in with his thoughts on that theory. He told Mashable: "I?m just saying it?s a valid theory.