Matt Baker is staying close to home, exploring the Chilterns landscape and the people and skills that have shaped this Area of Outstanding Natural Beauty. He discovers some hidden historical gems revealed by a revolutionary new mapping technique, heads deep into the woods to learn about the ancient art of bodging and rolls his sleeves up to help clean up ponds which are so desperately needed by wildlife. Joe Crowley investigates if large-scale schemes such as HS2 tally with the government's pledge to go green, and on the farm, Adam calls in a horse whisperer to help with a nervous Exmoor pony.