Phil, a researcher for the TV series Dale Winton's Overnight Ghost Hunt, goes to Ravenhill Hospital to expect it for a forthcoming shoot. While there he is haunted by visions which manifest themselves into the form of four stories. The special guest stars Imelda Staunton, Katherine Parkinson, Sarah Solemani, Jason Watkins, Mark Bonnar and David Cann. (thetvdb.com)