Having read Susan Hill's horror classic some time ago, the back of my mind considered The Woman in Black as a kind of horror piece; but it's not - it opens with the story of a woman impersonating a call girl to help a detective  solve a mystery that has kept his investigation at arm's length. But her mission is about to become a lot more complicated; not only because a new speech emulation program is enabling her to pull off the switch so far, but because she is also becoming more involved…