Bolton priory.--Glastonbury abbey.--Iona, or Icolmkill.--Lanthony abbey.--Chepstow castle.--Tintern abbey.--Raglan castle.--Conway and its castle.--Goodrich castle ...

Historian Dan Jones explores the millennium of history behind six of Great Britain's most famous castles: Warwick, Dover, Caernarfon, the Tower of London, Carrickfergus, and Stirling.

Dan goes behind the battlements of Dover Castle, where he descends into an underground lair to discover how a vast network of tunnels has been used to defend both the castle and the country for ...