Countryfile is in Hertfordshire, where Charlotte Smith meets the man who's made it his sole mission to save the barbel in the Old River Lea. Sean Fletcher is building a home fit for a Kingfisher and foraging for a wild dinner. John Craven is returning to his days as a scout and cooking up a storm on a woodland fire. And Adam Henson is discovering the estate where rewilding and farming sit side-by-side. Now in its fifth year, what effect is culling badgers actually having on rates of TB in our cattle? Tom Heap's looking at the science behind this controversial practice.

Helen and Sean are on the Cleveland Way in North Yorkshire. Helen meets the team of Scouts who have 'adopted' their own stretch of the 109-mile trail and are busy clearing gorse and doing some vitalmaintenance. She then joins the Hardmoors, a group of ultra marathon runners who have also adopted their own stretch, on a run through some spectacular countryside.

Sean explores Yorkshire childhoods through an incredible oral history project, before joining wildlife photographer Glenn Kilpatrick as he attempts to photograph leaping salmon on the beautiful River Esk.

Blacksmith and artist Katie Ventress takes Countryfile to her favourite stretch of coast. Tom has an exclusive look at a major new report into the effects of climate change on our bird populations, and Adam meets the young couple getting into farming despite not having a farm.