Episode 1
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.
Episode 2
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.
Episode 3
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.
Episode 4
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.
