Return to the scene of one Alexander the Great's most decisive battles, where he wrested control of the Persian Empire from Darius III. Using cutting-edge computer gaming technology, we recreate the Battle of Gaugamela in 331 BC. Host Matthew Settle (Band of Brothers) travels to an area north of Babylon, handpicked by Darius for his cavalry-led army. But Alexander created a typically brilliant plan of attack, marked by speed and superior discipline, to win one of the finest victories of his illustrious career.