Terry Jones' Great Map Mystery is a four-part television documentary series first broadcast on BBC Two Wales in 2008 and presented by ex-Python Terry Jones. As described on the BBC's website, "Terry Jones sets out on a series of journeys through Wales following the world's first road atlas: John Ogilby's Britannia, published in 1675.Episode 3: St David's to HolywellBBC's episode description: "Following an ancient pilgrim route, Terry discovers that the map contains a dangerous secret, with a trail of intrigue leading all the way back to the throne of England and King Charles II."