premise: Game of Thrones (season 7) will introduce several new cast members.
hypothesis: Game of Thrones (season 7) . Game of Thrones features a large ensemble cast , including Peter Dinklage , Nikolaj Coster-Waldau , Lena Headey , Emilia Clarke and Kit Harington . The season will introduce several new cast members , including Jim Broadbent and Tom Hopper .