Season 4 of The Last Kingdom is now available to watch, released today on Netflix, with Joseph Millson's character returning as Aelfric. 

After the death of Alfred, the alliances between the kingdoms are fractured. Uhtred believes the timing is right to challenge his uncle Aelfric, played by Joseph Millson (Casino Royale, Banished), and take back his ancestral home, Bebbanburg. However fate shifts in a different direction, leading Uhtred to realise that his destiny is tied to Alfred’s dream of a united land. This, and Uhtred’s feelings for Aethelflaed, drive him back into the politics that threaten to break out into war.

For more information about Aelfric, and season 4, there is an excellent article on Den of Geek, with a review of episode 1 here.