Watch on Soap2day. The historian investigates the discovery of a group of Viking graves in the eastern Baltic that date back over 1200 years, predating the established start of the Viking era. Bettany follows the investigation from Estonia to Sweden, uncovering how scientists and archaeologists reconstructed the men's origins, kinship and fate, and uncovered a tantalising question. Could one of these warriors have been the legendary Viking king who inspired an epic saga?