Watch Series: Secrets of Great British Castles Released in (2015) - Season 2 produced by UK, The TV Series categorized in Documentary, and content rating PG with duration 45 min broadcasted as these networks Channel 5, Channel 5 (UK), Netflix, Streamed at Putlocker & directed by Gerry Hoban, Maurice Sweeney, Sarah Share. 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. - Season 2