The Haunting of Hill House emerged from the shadows last year to become something of a phenomenon, not only critically acclaimed but picked over for theories, clues, and hidden ghosts the way only a pop culture breakout could be. Mike Flanagan's ten-episode adaptation of Shirley Jackson's landmark horror tale arrives on Blu-ray October 15 if you're looking to continue that ghoul-hunt in high quality. But the selling point for anyone interested in any part the filmmaking process—writing, directing, producing, acting, cinematography, lighting, etc etc—is Flanagan's commentary on the premiere ("Steven Sees …