Mehran Modiri and Peyman Maadi behind the movie Walnut Tree

Done right, behind-the-scenes docs can become as indispensible, iconic and canonical as the films whose (inevitably rocky) birth they help immortalize—full of high stakes, ticking clocks and outsized characters with fragile egos and hair-trigger tempers. Just think: all the building blocks of great drama are already sitting there right behind the camera, waiting to be captured.