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.
Episode : 1
Season : 1
Air Date : 2015-04-03 00:00:00
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.
