Holmgang

Holmgang was a way to get an argument settled among "Vikings". In the first episode The Homecoming of the Vikingane/Norsemen TV-Series, the farmer Olvar is challenged to such a duel by warrior Arvid.

Of course not all arguments ended in a duel. Usually, disputes were settled in a "Thing". A Thing is part of the show in Season 2, Episode 5: The Thing.

Should the challenged party not appear to the Holmgang this party would considered Niding - an outlaw. This is also mentioned in the show by Liv when she finds the scared Olvar hiding in a hut.