Dougie steps out into an epic landscape, as he visits the biggest national nature reserve in the country, Mar Lodge Estate. Covering 29,000 hectares, and with 15 munros of the eastern Cairngorms, he sees the major regenerative work in the restoration of the ancient Caledonian forest. Dougie also reports on a project on the other side of the Cairngorm mountains that will see the release of captively bred Scottish wildcats later this spring.Arlene goes back to school at the Scottish Rural College near Dumfries to get some hands on experience of outdoor lambing, while Cammy gets up early for milking and meets the dairy farming brothers who are bringing their milk direct to the masses.