Britain's Medieval Castles

S1, E5: Medieval castles and cathedrals are some of the most striking sites in all of Britain. Here, survey the development of castles built between 1066 and 1500. As you reflect on the evolution of the stone keep and outer wall, concentric design, and more, your tour takes you to such crowd-pleasers as the Tower of London, Caerphilly in Wales, Dover Castle, and more.