Britain is crisscrossed by a network of ancient track ways that have been traveled for over 5000 years. In a new four part series, Tony Robinson returns to explore the mysteries and legends on these remarkable routes. Tony hikes across Dartmoor in the footsteps of Britain's greatest detective, plunges into a reputedly bottomless lake and comes face-to-face with a four-legged beast. Written by Brian Henry Martin

Tony Robinson explores the mysteries and legends of more of Britain's ancient track ways, from Dartmoor to Dere Street. Tony walks Offa's Dyke in the footsteps of William Wordsworth, encounters Wales's fearsome dragon and ponders the priceless gold coin issued by King Offa in praise of Allah.

Tony Robinson explores the mysteries and legends of Britain's network of ancient track ways. In episode 3, The Portway, Tony uncovers a prehistoric shark tooth, shines a light in an abandoned railway tunnel and discovers DH Lawrence's mountain retreat in the Peak District. Written by Brian Henry Martin

Tony Robinson explores the mysteries and legends of more of Britain's ancient track ways, from Dartmoor to Dere Street. Tony follows the Roman road of Dere Street north through Hadrian's Wall, contemplates the ancient night sky, braves the roar of a Celtic horn, mixes medieval potions and encounters ancient invaders. Written by Brian Henry Martin