The first trailer for “House of the Dragon” season three is finally here and HBO confirmed the third chapter of the four-season saga will drop in June. Based on “Fire & Blood" by George R. R. Martin and set roughly 200 years before “Game of Thrones,” the new footage shows Aemond Targaryen, played by Ewan Mitchell, seated on the Iron Throne while Rhaenyra, played by Emma D’Arcy, strengthens her claim by sending more dragons into the escalating civil war. The trailer teases massive clashes as alliances fracture and the fight for Westeros intensifies.