

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 centuries.
Aired: 4/3/2015
Built by William the Conqueror, the Tower of London has been a military fortress, a palace, a royal mint, a prison, a zoo and a place of execution, a silent witness to some of the most momentous events in our history. Dan Jones reveals some of its secrets and tells the stories of the traitors, rebels and royalty who met their end inside its imposing walls.