Westeros plunges into war when the 'Game of Thrones' prequel returns to HBO June 21.
Season 3 launches June 21 with the Battle of the Gullet and three new dragonriders reshaping the conflict. Targaryen visions foreshadow Aemond's death and unprecedented dragon warfare escalation.
It's all-out war in Westeros this season
House of the Dragon Season 3 debuts June 21 on HBO Max; 300+ filming days, 1,500 cast/crew, record-breaking stunts. Entertainment investment choices signal streaming platforms' continued focus on blockbuster IP despite industry margin pressures.
HBO released a "House of the Dragon" featurette about the "extraordinary" scale of Season 3 and its world record-setting battle sequence.