Set 200 years before the events of “Game of Thrones,” the new “House of the Dragon” (HBO, 9 p.m.), chronicles the early days of the overly-blonde, dragon-handling Targaryens. As such there’s a whole new cast (except maybe the dragons) with Matt Smith, Milly Alcock, Emma D’Arcy and Olivia Cooke. And while it seems like an […]