Blood of the Vikings was a 5 part 2001 BBC Television documentary series that traced the legacy of the Vikings in the British Isles through a genetics survey.
In the last of the series, Julian Richards uncovers new information from the battle in 1066 between Viking warlord Harald Hardrada and King Harold of England that marked the end of the Viking age in Britain. Results from a nationwide genetic survey show where in Britain the Vikings left a measurable contribution.