'I Know This Much Is True' Director Derek Cianfrance on Filming Two Mark Ruffalo Performances

Summary: Listen to Collider.com editor-in-chief Steve Weintraub's 90 minute conversation with Derek Cianfrance, director of Blue Valentine, The Place Beyond the Pines, and the HBO limited series I Know This Much Is True. Cianfrance explains in great detail the ups and downs of crafting the six-hour series, starring Mark Ruffalo as twin brothers.