I too watched the Channel 4 showing. Must disagree with the previous comment. I thought it was a very mediocre film, especially when you think the story was penned by Francis Durbridge. As for the plot, well please tell what were the motives for the murders? I will agree, an excellent film to watch, if you are looking out for those great 'B' film character actors. ( uncredited appearance of Hal Osmond, then only 38, looking thirty years older). The petrol forecourt scene, and chastisement of Superintendent John Mills by the bicycling village 'plod' were great little scenes. Who was the actor who played the 'bobby'?