A still from the HBO phenomenon Game of Thrones shows, from left to right, Nathalie Emmanuel as Missandei, Peter Dinklage as Tyrion Lannister, Conleth Hill as Varys, Emilia Clarke as Daenarys Targaryen and Jacob Anderson as Grey Worm. Viewing numbers for the show, which aired its seventh  season in 2017, are difficult to track owing to the different ways in which consumers watch. Its season finale attracted 12million viewers the night of and 17million total including the following week, according to estimates from Nielsen and HBO
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