This is pretty good. At the center of everything is a horror movie made from a book written a hundred years before. There is a family that is slowly being murdered. The episode begins with a handsome brother/actor after meeting the press, walks into a cricket pavilion and is blown to smithereens. The rest of the family, including one who is the producer of the very successful, though sleazy, movie, don't seem to be very emotional about the events of the death. It isn't long before a couple more are picked off. It all dates back to a time previous to the loss of copyrights. There is also a kind of class warfare between to halves of the same city that plays into everything. The principles are doomed to their own sadistic being. Barnaby and Troy try so hard to get a straight answer, but that bit of taciturnity feeds into the evidence. Good job.