Matt Smith as Daemon Targaryen and Emma D’Arcy as Rhaenyra Targaryen in House of the Dragon season 3. Sonoya Mizuno as Mysaria, Phia Saban as Helaena Targaryen in House of the Dragon season 3 episode 8. Tom Glynn-Carney (Aegon Targaryen) and Ewan Mitchell (Aemond Targaryen) in House of the Dragon season 3 episode 8. Benjamin Evan Ainsworth as Daeron Targaryen, James Norton as Ormund Hightower in House of the Dragon season 3 episode 8. Simon Chandler as the High Septon, Emma D’Arcy as Rhaenyra Targaryen in House of the Dragon season 3 episode 8.