S12E5 : Small Mercies

Richard Tanner is found murdered in a model village, stabbed and trussed up like Gulliver in a macabre tableau. The disturbing manner of his death leads Barnaby and Jones to suspect that someone in the village of Little Worthy is criminally insane. As further gruesome killings rock the community, the detectives face a race against time to unravel past events that lead to the making of a dangerous serial killer.