Dougie's at the Grey Mare's Tail Nature Reserve near Moffat in the Southern Uplands. He visits the spectacular waterfall and finds out how the busy path is maintained for visitors using hard graft and helicopters. Meanwhile, Cammy's in Angus to see how farming is being transformed by the latest technological innovations. Further north, Shahbaz is in Caithness, meeting a new entrant farmer who set up a dairy with a difference, milking sheep. Anne's in Argyll to see a project working to save river habitats and fish populations. And Arlene's tuning into the community-led radio station serving the remote populations of Wester Ross.