Guest Stars Charlie Duncan as Ralla Sagar Arya as Tewdric Gwion Morris Jones as Culwyn Sifiso Mazibuko as Hywel Enoch Frost as Ligessac Grace Ackary as Norwenna Kevin Metcalfe as Siluairan Warrior Ankur Sengupta as Siluairan Warrior Lily Williams as Younger Nimue