From battlefields and ancient swords to mighty castles and Durham cathedral, the story of William the Conqueror's journey from invader to ruler of England.

Tales of Cold War Britain, from nuclear threat to upper-class spies, eerie ghost bunkers and our very own Chernobyl.

Professor Alice Roberts, Professor Danielle George and Dr Onyeka Nubia examines surviving evidence of Britain's preparation for a Nazi land invasion during the Second World War, including the tragic story of one of the war's forgotten heroines. Alice learns about the deployment of the Home Guard, and Danielle travels to the Channel Islands to visit the only concentration camp to be built on British soil.

The first episode examines the surviving traces of Henry VIII's fear of invasion from Catholic Europe. Alice gets her hands on a vast hoard of Tudor coins and a 500-year-old jousting scorecard, as she learns how Henry's greed and ambition led him to bankrupt the nation and lay the foundations for the modern secret service.