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 Charlie O'Connor as Svein Henessi Schmidt as Gytha Maria Guiver as Aelfwynn Jack Walsh as Priest 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