Guest Stars Jennie Jacques as Judith Maude Hirst as Helga Moe Dunford as Aethelwulf George Blagden as Athelstan Edvin Endre as Erlendur Morgane Polanski as Princess Gisla Nathan O'Toole as Bjorn Lothbrok Owen Roe as Count Odo Amy Bailey as Princess Kwenthrith Dianne Doan as Yidu Seán T. Ó Meallaigh as Prudentius Co Starring Huw Parmenter as Roland Karen Hassan as Therese Luke Shanahan as Ubbe Stephen Rockett as Hvitserk Elijah O'Sullivan as Sigurd Des Carney as Waerferth the Scout Niall Cusack as Abbot Lupus