After 15 episodes we finally come to the most famous year in English history. Harold Godwinson has taken the throne to become Harold II, but he is facing invasion from two powerful rivals. In Normandy, Duke William is massing an invasion force to take the crown promised to him by Edward the Confessor. Meanwhile, the fearsome Viking Harald Hardrada, backed by Tostig Godwinson, is planning to press his own tenuous claim. Three men, three battles - one year, one victor. It's 1066!