Countryfile is in Devon, where Matt Baker explores Dartmoor. He discovers the story of a WWII bomber which crashed on the moor and hears about one man's mission to find the truth behind what happened on that fateful night. Matt helps with a geophysics search of the site to see if the key to the crash can be unearthed. He also meets with a farmers' co-op in Dartmoor, where 50 farmers work together. Matt takes to horseback to help them with a cattle round-up. Anita Rani meets a sculptor who is inspired by the ancient trees in the Devon landscape. She dons her snorkel to help him look for one vital ingredient in the river Dart - bog oak. She also finds out about a groundbreaking countryside project which aims to turn lives around and get offenders back into work. Many people dream of owning a second home in the countryside or by the sea. But are these holiday retreats doing more harm than good? Charlotte Smith investigates.