With films like Blue Valentine, The Place Beyond the Pines and The Light Between Oceans under his belt, writer-director Derek Cianfrance has been a filmmaker to watch for a while now. He has been working on a movie called Metalhead for years now but it seems to be stuck in a half-finished state due to both creative and financial reasons. In the meantime, he is turning to television with a limited series coming to HBO next month called I Know This Much is True. The show stars Mark Ruffalo in dual roles as two twin brothers, one of whom is struggling with paranoid schizophrenia. Based on the novel by Wally Lamb, the entire six-episode series is directed by Cianfrance and it premieres on HBO on April 27th. Check out the trailer below and let us know what you think.