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Featuring the oldest castle gate in Europe and the highest aqueduct in the UK.
Neil Oliver reveals the mystery of how the Gaelic Scottish Kingdom - Alba - was born.
Paul Murton investigates the story of Clan Douglas.
The secret history of the non-aggression pact between Hitler and Stalin.
The team decipher the writing on a stone pillar and uncover an 18th century copperworks.
Phill Jupitus narrates a look at fifty years of British food advertising.
Neil Oliver charts the story of the two men who helped transform Alba into Scotland.
Paul Murton reveals the surprising origins of Scotland's most famous family.
The secret history of Stalin's dealings with the West in the wake of the German invasion.
Rosie Newman, who shot some of the most important colour documentary footage of the 1930s.
Huw Edwards and his team examine a Tudor house, a Roman theatre and a chapel.
Exploring the treasures of the Scottish Fisheries Museum in Anstruther.
Virologists attempt to detect the genetic footprint of Spanish Flu by exhuming a body.
Ian Hislop looks at the 1963 Beeching Report, which closed a third of the UK's railways.
The adventurers compete in a punishing race up a mountain in the shadow of Everest.
In southern Ethiopia, the lads take on the deadly sport of Suri stick-fighting.
In Burkina Faso, the contestants take part in a brutal inter-village wrestling contest.
The lads are in a very rainy central Brazil to race canoes against the Wauja tribe.
The life story of Titus - a silverback living in Rwanda's Virunga Mountains.