Why Director Derek Cianfrance Approached 'I Know This Much Is True' Like a 6.5 Hour Movie

From writer/director Derek Cianfrance and based on the award-winning novel of the same name by Wally Lamb, the six-part HBO limited series I Know This Much Is True follows identical twin brothers Dominick and Thomas Birdsey (played in two stand-out performances by Mark Ruffalo) on their very different life paths. It's a family saga of sacrifice and forgiveness that begins in their present in the early 1990s and digs into different stages in their lives, as it highlights how mental illness affect...