Guest Stars Georgia Hirst as Torvi Jennie Jacques as Judith Adam Copeland as Kjetill Flatnose Ferdia Walsh-Peelo as Alfred Ida Nielsen as Margrethe Darren Cahill as Aethelred Leah McNamara as Aud Ben Roe as Guthrum Kris Holden-Ried as Eyvind Kieran O'Reilly as White Hair Frankie McCafferty as Sinric Jonathan Delaney Tynan as Lord Cuthred Karima McAdams as Kassia Paul Reid as Mannel Kal Naga as Ziyadat Allah Albano Jerónimo as Euphemius Daryl McCormack as Young Arab Man