Everyone's once again after the Iron Throne in this Game of Thrones prequel series, set 200 years before the events of the original series and revolving around House Targaryen. Paddy Considine, Matt Smith, Olivia Cooke, Emma D’Arcy, Steve Toussaint, Eve Best, Fabien Frankel, Sonoya Mizuno, and Rhys Ifans star on the series, which debuts Sunday, August 21 on HBO and HBO Max.