King and Conqueror” has revealed additional cast members, including “The Crown’s” Luther Ford and “Game of Thrones” actor Joseph Mawle, as it begins production in Iceland. According to its official plot description, “King and Conqueror” is “the story of a clash that defined the future of a country – and a continent – for a thousand years, the roots of which stretch back decades and extend out through a pair of interconnected family dynasties, struggling for power across two countries and a raging sea.