2. Marks on the Landscape

Charlie's odyssey heads to Wiltshire, home to ancient sites such as Stonehenge, Avebury and the Westbury chalk horse, to get to the bottom of why humans feel the need to leave marks on the landscape.

3. King Arthur's Treasure

Charlie Cooper has always loved the stories of King Arthur, especially the ones about his buried treasures. He digs out his metal detector and embarks on an Arthurian investigation.

4. Winter Solstice

Keen to escape the trappings of a modern Christmas, Charlie wraps up warm and heads to Devon to start an investigation into alternative winter celebrations.