In the Beechgrove Garden, Jim is investigating the mysterious death of a hedge. He suspects foul play, and has a water diviner on hand to search for clues. Carole is in Ardersier for the second visit to see how Mari Reid and her friends are getting on in Vegetable Gardening on a Budget. Recent research suggests that we could all save £1,500 a year by growing our own. Mari and her friends are putting that theory to the test. Jim takes the high road to Ballinluig, where Ian and Christine Jones have created a hidden gem of a garden at 600ft above sea level.