在第三季中，阿尔弗雷德大帝仍然梦想将整个英国团结起来，但丹麦人不停歇的进攻危及他的所有计划。阿尔弗雷德大帝心中很清楚，只有一个人能镇压所有的反抗势力，结束诸侯战争，确保「威塞克斯王朝」（Wessex Dynasty）的统治——那就是与世无双的英雄战士Uhtred。但是两人不稳定的关系已经到了快要彻底崩溃的地步，Uhtred必须面对一个可怕的事实：如果他背弃阿尔弗雷德大帝的民族统一事业，他一生的奋斗将化为流水，一切都将改变。第三季有10集，比前两季的8集略长。

Fans of the sword and shield drama The Last Kingdom won’t have to wait much longer for season 3, as Netflix announces the series will launch this November in both the U.S. and the U.K. The third season will also have two additional hours, upping the usual episode count from eightto ten.That will likely be welcome news for fans of the series, as it makes the switch from BBC Two and BBC America to a Netflix exclusive series. 　　Based on The Saxon Stories, by Bernard Cornwell, The Last Kingdom follows the story of Uhtred (Alexander Dreymon) and works in the tradition of History’s Vikings, using real history as the backdrop to a fictionalized storyline. The series takes an unflinching but still appealing look at the hardscrabble lives of late 9th century kingdoms, as they fight for survival against invading Vikings (oddly enough), while also working to build a future for themselves.