The Last Kingdom has been renewed for a 5th season by Netflix.
"The news comes just under three months after the release of Season 4 on April 26. Season 5 will consist of 10 episodes, as did Seasons 3 and 4."
"Based on books nine and ten – “The Warriors of the Storm” and “The Flame Bearer” – the fifth season will see Uhtred realize his destiny is more than just Bebbanburg: it is tied to the future of England itself. Charged with training King Edward’s first-born son Aethelstan as a warrior, Uhtred’s ambition will have an even higher purpose. But to achieve this destiny, Uhtred will have to face down his greatest enemy and suffer his greatest loss."