Guest Stars Eliza Butterworth as Aelswith Arnas Fedaravicius as Sihtric Millie Brady as Aethelflaed Jeppe Beck Laursen as Haesten Adrian Bouchet as Steapa Simon Kunz as Odda the Elder Peri Baumeister as Gisela Christian Hillborg as Erik Magnus Samuelsson as Clapa Björn Bengtsson as Sigefrid Ole Christoffer Ertvaag as Sven Alexandre Willaume as Kjartan Peter McDonald as Brother Trew David Schofield as Abbot Eadred Richard Rankin as Father Hrothweard Jóhannes Haukur Jóhannesson as Sverri Marc Rissmann as Tekil Erik Madsen as Fiske Christopher Sciueref as Jonis Andre Eriksen as Earl Ulf John McAllister as Messenger Boy Mark Flitton as Blacksmith