Midsomer Murders

David Mostyn is shocked to find his mother Delyth in bed with Dr James Kirkwood, a senior partner in the Midsomer Market surgery, but the beautiful divorcee is delighted when James uses the occasion to propose to her - her daughter Megan, James' practice manager, is equally outraged and especially when Delyth tells her they are planning to sell up and travel the world. James also has the difficult task of telling Dorothy Hutton, his late wife's mother who is still grieving, and asks his surgery partner Alan Delaney to check on Dorothy while lending him his brand-new Range Rover for the journey - when Alan has to leave the car during a storm, a pick-up truck drives into him at speed and kills him. Barnaby and Jones dig into Alan's past and discover that James once accused him of stealing 30,000 pounds from the practice, but it was put down to clerical error and the two doctors made up - as Barnaby and Jones investigate, they find that they must travel to Snowdonia to unravel the truth.