Matt Baker and Ellie Harrison visit the largest privately owned estate in Devon, which has been in the same family for more than 700 years, to discover how the 25,000 acres are shaping up to the future. Matt joins the calving team at Clinton Devon Estates and sets the wheels in motion at a 900-year-old watermill, while Ellie checks out a mammoth project where the sea will be more than welcome to flood the land. Then, she meets the organic farming duo who also juggle part-time jobs as a lecturer and a GP. Adam's getting ready for spring on his farm, and Charlotte investigates what the new environmental land management schemes will mean for the future of food production.

Matt Baker and Joe Crowley get their walking boots on as they visit Snowdonia National Park. Home to Wales's largest natural lake and its highest mountain, Mount Snowdon, the park shot to the top of the staycation list last summer as more Brits than ever holidayed on home turf. But Snowdonia is paying the price for its popularity, as the heavy influx of tourists is taking its toll on the landscape. Matt finds out about the invisible scourge of micro-plastics plaguing the scenic landscape, while Joe mucks in with a mountain makeover as he helps repair the footpaths. Tom Heap investigates the growing problem of vandalism and anti-social behaviour in our National Parks, and Adam Henson visits a farm in Wiltshire where cow dung is being used to generate electricity.