Guest Stars Matt Mella as Lanval Sagar Arya as Tewdric Charlie Duncan as Ralla Gwion Morris Jones as Culwyn Sifiso Mazibuko as Hywel Enoch Frost as Ligessac Grace Ackary as Norwenna Lucy Allix as Young Nimue Cy Foxx as Dumonian Leader Jordan Dark as Young Derfel Bryony Morgan as Tattooist Rob Murphy as Dumnionan Guard