Broadcaster Michael Buerk and historian Bettany Hughes present a series of programmes counting down the 50 greatest treasures discovered by the British public. The order has been compiled by a panel of experts from the British Museum and the Council for British Archaeology. In the first programme, journalist John McCarthy discovers the story behind a Roman slave shackle found in Winchester, military historian Saul David discovers how dangerous an 18th-century toy cannon from Somerset could have been and Bettany meets the five-year-old boy who found a gold reliquary valued at 70,000 pounds.