Countryfile is in Lancashire. John Craven will be exploring one of the county's hidden jewels. Buried beneath undergrowth, he finds a landscape which was once a true spectacle but is now almost lost to the ravages of time. Ellie Harrison is exploring the sculptural art of the area with a spectacular work built by a local artist to celebrate the Forest of Bowland's 50 years as an area of outstanding beauty. Countryfile favourites Ian McMillan and Tony Husband are back, this time in Tony's home county where he'll be trying to convince Yorkshireman Ian of the the joys of the Lancashire countryside. Adam Henson is on his Cotwolds farm as his Exmoor ponies are DNA checked before being rehomed. After claims that commonly used pesticides could be banned in the future, Tom Heap asks how essential chemical products are to modern farming.