In Season 4, the nation of Wallachia collapses into chaos, with factions clashing. Some attempt to assert control, as others try to bring Dracula back from the dead. Nobody is who they seem, and nobody can be trusted. These are the end times, after all.

Debbie Ocean, a criminal mastermind, gathers a crew of female thieves to pull off the heist of the century at New York's annual Met Gala.

The year is 878 and Wessex is free from the Vikings. Uhtred, the dispossessed son of a Northumbrian lord, helped Alfred win that victory, but now, as ‘The Lords of the North’ begins, he is disgusted by Alfred’s lack of generosity and repelled by the king’s insistent piety. He flees Wessex, going back north to seek revenge for the killing of his foster father and to rescue his stepsister, captured in the same raid. He needs to find his old enemy, Kjartan, a renegade Danish lord who lurks in the formidable stronghold of Dunholm. Uhtred arrives in the north to discover rebellion, chaos and fear. His only ally is Hild, a West Saxon nun fleeing her calling, and his best hope is his sword, with which he has made a formidable reputation as a warrior. He will need the assistance of other warriors if he is to attack Dunholm and he finds Guthred, a slave who believes he is a king. If Guthred is to rule Northumbria he needs Uhtred and Ragnar, the Dane who is Uhtred’s sworn brother. Guthred, though, is weak and yields to treachery...

在2003年入侵伊拉克的前夜，波特带领一组特种部队参与解救人质的行动，因不忍而放过持枪的当地童兵，结果同队的伙伴被杀害，连他和卡林森都受伤且损失惨重。七年后，波特得以重回战场，作出补偿。

成长于英国南部田园风光中的玛格丽特（丹妮拉·丹拜-阿什 Daniela Denby-Ashe 饰）因为作为牧师的父亲辞了工作，一家人搬到了全然陌生的北方小镇米尔顿。不同于南方的温暖舒适，处于工业革命时期的米尔顿阴冷又脏乱。路上不再是芳香花草，取而代之的是粗鲁的工人，棉絮 飞舞的纺织车间。除了新环境的不适应，还有来自纺织厂的厂主——年轻的实业家约翰桑顿（理查德·阿米蒂奇 Richard Armitage 饰）的盛气凌人及对工人的苛刻，这让玛格丽特对桑顿的第一印象极其糟糕。 随着米尔顿生活的加深，玛格丽特渐渐认识到工人粗鲁暴脾气背后的温柔和疾苦，坚定的站在他们一边。和其立场相反的雇主桑顿则对玛格丽特一见钟情，但不善表达的他似乎在无形中把玛格丽特越推越远。二人如同南方与北方，截然相反但又紧密相连……