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 Niall O'Brien as Soldier David Shannon as Viking Messenger Mark Byrne as Man Owen Barton as Osparkr Stefán Haukur Jóhannesson as Magnus Ruairí Lenaghan as Woodsman