Clare Balding walks across Dartmoor with the former head of the Royal Marines.
Helen Mark visits Devon's Beer Quarry Caves which supplied Exeter cathedral with limestone
Clare walks with members of the Tavistock-Dartmoor Search and Rescue Team, and their dogs.
Dartmoor is the walking territory of writer Tom Cox, author of 21st Century Yokel
Helen Mark discovers the story of man's earliest ancestor on the Jurassic Coast in Dorset.
Helen Mark visits Lyme Regis' Undercliffs, a jungle created by 200 years of landslips.
Lionel Kelleway and Mark Lawrence hunt for birds' nests hidden on Dartmoor. From 2010.
Clare Balding walks across a wild Dartmoor with former Royal Marine Pen Farthing.
Helen Mark is stargazing in Devon and Cornwall for the Perseids meteor shower.
Scientists analyse a small jawbone found in Kent's Cavern in Torquay over 80 years ago.