The first programme takes the duo to Tintagel Castle on the dramatic Cornish coast. It's famous for its links to King Arthur, and is said to have been the monarch's birthplace. But can there really be any truth hidden among the tales of magicians, dragons and swords in stones? Ben's bird's-eye view reveals its roots in the Dark Ages, while Bettany suggests that the location was once part of the world's richest trade network and would probably have been ruled by a king important enough to have become a legend.

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Tags: ITV, Secrets, from, the, Sky