FULL SPOILERS for House of the Dragon season 3 episode 7, "The Dragon in Winter" beyond this point. Phia Saban as Helaena Targaryen and Emma D’Arcy as Rhaenyra Targaryen in House of the Dragon season 3 episode 7. Ewan Mitchell as Aemond Targaryen and Olivia Cooke as Alicent Hightower in House of the Dragon season 3 episode 7. Emma D’Arcy as Rhaenyra Targaryen, Sonoya Mizunoas Mysaria in House of the Dragon season 3 episode 7. Matt Smith as Daemon Targaryen and Emma D’Arcy as Rhaenyra Targaryen in House of the Dragon season 3 episode 7.