Selome Hailu Westeros came back to HBO last night with the series premiere of “House of the Dragon” — and brought the masses along with it.“House of the Dragon” drew in 9.99 million viewers across HBO and HBO Max after premiering with one episode on Sunday, according to Warner Bros. Discovery.“Game of Thrones” has remained HBO’s biggest hit of all time since concluding in 2019, and as its prequel series, “House of the Dragon” is arguably the project to get the most marketing and fanfare from the network since.