BBC Four series in which Bettany Hughes retraces the lives of three great thinkers whose ideas shaped the modern world - Karl Marx, Frederick Nietzsche and Sigmund Freud. MORE INFORMATION AND EPISODE AVAILABILITY - BBC.CO.UK BUY NOW VIA BBC STORE NOW AVAILABLE ON NETFLIX: US/CANADA/SPAIN/BRAZIL/ASIA REVIEWS "The television historian Bettany Hughes, bright-eyed, bushy-tailed, energetic, enthusiastic and rather astonished, has tramped across the continents on our behalf, making