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In this episode, Dougie is at the spectacular Corrieshalloch Gorge in Wester Ross taking a walk through the improved trails and pathways. He finds out how the reserve manages to maintain its dramatic outstanding beauty despite the growing number of tourists visiting each year.

Cammy is on the shores of Loch Ness on the trail of feral pigs that are damaging crofts and farmland in the area and attacking livestock. Arlene is also on a hunt, but she is on horseback taking part in a Fife bloodhound meet where the riders chase human runners.

Anne is in the Cairngorms helping to release critically endangered pine hoverflies in order to help improve the forest ecosystem, while wildlife film-maker Libby Penman is at Aberdeen Harbour as she continues her search for city-dwelling wildlife.