History Channel series Engineering an Empire – The Persians (Dec 2006):

Part 1: Medes, Persians, Cyrus the Great

 

Part 2: Cyrus the Great, Pasargadae, Persian gardens, Darius the Great

Part 3: Darius the Great and Marathon, digging canal between the Red Sea and  Mediterranean Sea, building bridge over Bosphorus

Part 4: Xerxes and war at Thermopylae

Part 5: Artaxerxes, building Mausoleum, Darius III, Alexander invasion