Source of Civilisation - S1.E6

To discover the origins of these people and their civilization that flowered long before Alexander’s arrival David enters one of the least visited places on earth – the Wakhan Corridor. With a caravan of twenty-five yaks, horses and handlers, he begins the final leg of his Quest for Alexander’s lost world and experiences what it was like for Alexander’s army to live and fight in the high passes on the roof of the world.