Desperate to win the contract to clean up the abandoned Danvers State Mental Hospital, the boss of an asbestos removal company promises a fast completion. The crew have their own personal history and tensions run high, but the derelict building has its own past and they are about to uncover the dark secrets hidden within its walls.Audio commentary by Director and Writer Brad Anderson and Writer Stephen GevedonNew audio commentary by Mike White and Jed AyresThe Darkside: a new interview with Brad AndersonMike's Session: a new interview with Stephen GevedonBack to the Bat: a new interview with Producer David Collins and Director of Photography Uta BriesewitzInvisible Design: a new interview with Production Designer Sophie CarlhianThe Sound of Dread: a new interview with Composers Robert Millis and Jeffery TaylorA Twisted Collage: Alexandra Heller-Nicholas on Session 9Return to Danvers documentaryThe Haunted PalaceHorror's Hallowed Grounds: Session 9Story to Screen with optional Director