Part 6: City Of Man, City Of God

S1, E6: Archaeologist Richard Miles concludes his epic jaunt for BBC Select though the history of civilization by examining the fall of the Roman Empire. At the height of its power, the Empire extended from Hadrian's Wall to the Euphrates with 60 million subjects. But did the freedoms that these citizens enjoyed allow them to ask difficult questions about religion and power which led to Rome's demise?