A dystopian powerhouse in Pennsylvania, USA that once served in WWII; a dark past unearthed from a fairy-tale castle in Poland; Anglo-Saxon religious ruins across vast plains of Scotland; and a forgotten village that witnessed the rise and fall of Jerusalem.

This episode travels to Chile, the Maltese capital Valleta, Havana and Germany, to reveal: honeymoon home of a young princess that offered her a glimpse of freedom; grand monuments designed by the most notorious dictator of the twentieth century; a sprawling industrial complex?the site of a ruthless disappearance; and?the artistic dream of?a revolutionary now in?ruins.