Described as an “up close and personal report from the trenches of production,” the movie will show how production was completed while battling extreme weather, deadlines and a growing fandom always on the hunt for spoilers. “Much more than a ‘making of’ documentary, this is a funny, heartbreaking story, told with wit and intimacy, about the bittersweet pleasures of what it means to create a world—and then have to say goodbye to it,” HBO said in a release.