Episode: The Case of the Deadly Prophecy. Holmes receives a letter from Marie Grande, a schoolteacher in a small town in Belgium, describing a string of strange deaths, one each month. On each occasion, a death prediction has been found written in chalk on the steps of the local church at the full moon - this is soon followed by the demise of the individual named, always of natural causes. Marie has discovered that Antoine, one of her students, writes the predictions while sleepwalking. Does Antoine have the gift of prophecy, or is a more sinister plot afoot? Holmes decides to find out.