Guest Stars Lujza Richter as Liv Stanislav Callas as Jorundr Pollyanna McIntosh as Queen Ælfgifu John Kavanagh as The Seer Søren Pilmark as Sweyn Forkbeard Co Starring Christopher Rygh as Agnarr Henessi Schmidt as Gytha Charlie O'Connor as Svein Jack Walsh as Priest Maria Guiver as Aelfwynn Ruben Lawless as Harald Harefoot James O'Driscoll as Assassin Mae Higgins as Girl Fiona Browne as Mother Mark Byrne as Man Owen Barton as Osparkr David Shannon as Viking Messenger Niall O'Brien as Soldier Stefán Haukur Jóhannesson as Magnus Ruairí Lenaghan as Woodsman