Whistle and I'll come to you

One of a spate of M.R.James adaptations that the BBC shot from the late 'sixties to the early 'eighties. All of them were memorable but this is comfortably the best. Michael Hordern is the hapless academic who goes to the coast for a short holiday and accidentally awakens something unnatural while pottering around in the remains of a Templar preceptory. This isn't a story about a monster, though, but rather something that stays at the edge of perception. The supernatural events are alternated with the mundane day to day life at the boarding house where Hordern is staying. Everything seems commonplace but he -- and the viewer -- are troubled by the feeling that there are some things that should be left well alone. Finally, his nightmares become concrete and...