The accepted chronology of ancient Egypt and Babylonia is wrong to a dramatic degree, with some major historical events mis-dated almost 2000 years before they actually occurred, according to this controversial series. Part 4 brings the reconstruction to a close. The 19th Dynasty is shown to have ended in 525 BC with the Persian Conquest, and the last important 19th Dynasty ruler, Seti II, is shown to have never ruled an independent Egypt.