Chandler and Miles attend the launch of Buchan's book on murders in Whitechapel where they are baffled by cryptic remarks made by an eccentric old lady Louise Iver. At the same time elderly vagrant Alexander Zukanov is lured to a house with strange markings on the wall where he is pressed to death, giving the name Dorothy Cade to his killer before he dies. Miles and Chandler visit Zukanov's doss-house and learn that the other occupants were frightened of him and regarded him as a warlock. Buchan confirms that he was a member of the Bulgarian secret service and Stella Knight from MI6 names him as having been an interrogator of former British spy Crispin Wingfield. Wingfield is questioned but released though he tells the police that the manner of Zukanov's death was a punishment for witches in the sixteenth century. Meanwhile Dorothy Cade, living with her sister Cecilia, is also murdered, burnt at the stake like a medieval witch.

　　新一季中，Chandler团队终于走出了白教堂范围。
　　首次命案发生在白教堂附近隧道的凶杀案，尸体呈捆绑状态，中毒且形容可怖，给伦敦东区恐怖传说又增新料。残酷的罪行使得人们惶恐不安，这次又要靠Jones（鲁伯特·彭利·琼斯 Rupert Penry-Jones 饰）带领以警探Miles（菲尔·戴维斯 Philip Davis 饰）为首的chandler团队找出罪案的历史渊源，从凌乱的线索中找出真相。即使案件研究学者Edward（史蒂夫·佩姆伯顿 Steve Pemberton 饰）从300年的伦敦东区黑暗故事中淘出有用的线索，他们又能否用过去的噩梦来解决现在的罪案？在白教堂血案中，历史不是墙上的钉子，它可能是致命的……

　　经历了开膛手杰克的模仿者一案，Jones（鲁伯特·彭利·琼斯 Rupert Penry-Jones 饰）获得了所有所有下属的尊重，尤其是之前总是小看他的警探Miles（菲尔·戴维斯 Philip Davis 饰）。这一次他们要面对的凶手变得更加残忍、血腥。白教堂区陆续出现残忍谋杀案，凶手模仿的是上世纪50、60年代的著名黑帮孪生首脑Kray兄弟。经过进一步的调查，犯罪嫌疑人锁定在Kray兄弟的后代——Jimmy和Johnny这一对双胞胎身上。而他们这一次犯罪的目的就是向当年指证Kray兄弟的证人们报复，并巩固自己的黑帮势力。
　　这一次，他们是否能够成功将凶手缉拿？

　　伴随着种种猜测和推论，开膛手杰克作为历史上最神秘的连环杀手成功的把这个不解之迷从19世纪带到了21世纪。120年后的伦敦,仍然在那个白教堂区（Whitechapel）,重新出现了和当年开膛手杰克作案手法如出一辙的杀人案件.杀人犯效仿开膛手杰克的手法四处杀人。白教堂区警察局的探长Joseph（鲁伯特·彭利·琼斯 Rupert Penry-Jones 饰）被局长指派去调查出现在白教堂区发生的凶杀案。由于年轻,所以遭到下属的嘲笑。警探Miles（菲尔·戴维斯 Philip Davis 饰）对下属相当严格，对自己的判断相当有自信，不善听取别人的意见。对Joseph有相当大的意见，但是随着命案的连续出现和他的正确判断，开始敬佩新探长的能力。有了开膛手杰克学者Edward（史蒂夫·佩姆伯顿 Steve Pemberton 饰）的帮助，使得Joseph的调查有了实质的进展。经过警探们深入调查其中奥妙，究竟他们能否抓住真凶呢？

　　本剧由喜剧演员Jack Rooke创作、编剧和担任旁白，改编自Rooke的获奖现场喜剧作品《Good Grief》《Happy Hour》《Love Letters》。
　　故事讲述贴心、害羞，并且还在柜中的Jack（Dylan Llewellyn饰，《德里女孩》），和活力十足、年轻放浪又稍显成熟的Danny（Jon Pointing饰，《罗马三贱客》），两人产生了一段意料之外的友谊。
　　过去一年里，Jack都待在家中陪伴母亲，哀悼自己过世的父亲。如今Jack准备好踏上大学的旅程，在那里他遇见了室友Danny。两人在新生周被分配到了一起，由一名过分热情的学生会负责人照料。尽管Jack和Danny在男子气概方面处于完全不同的位置，但在大学第一年不可避免的混乱和疯狂中，两人却产生了紧密的联系。
　　Rooke希望本剧能像《大城小妞》遇见《中间人》配上《绝望的主妇》，混合许多sex和drugs，以及在床上哭着看《This Morning》。

　　Martha is at last a QC,making her senior to Reader. Their first case together is defending taciturn thug Brendan Kay,muscle for the infamous criminal Farr family,accused of half-blinding a motorist who fell foul of boss Jody Farr. Martha believes Farr's influential solicitor,sharp Micky Joy and Farr are conspiring to stitch up the innocent Kay for a crime Farr committed. Battling against both formidable prosecutor Caroline Warwick and head of chambers Alan Cowdrey for Farr,Martha finds that Reader proves to be an ultimate help to her. He also has a solo case, defending killer Fatima Ali,referred by female solicitor George Duggan,who resists his efforts to pursue her romantically.

　　On a leave of absence from the police force, Luther is laying low in a rundown cottage on the edge of England but a visit from his old colleagues at the Met brings a shocking piece of news that draws him back to London in search of the truth. Meanwhile, a gruesome serial killer has struck the city. With a trail of clues leading from one crime scene to the next, Schenk and his team must work out the twisted logic that connects each victim but this murdering mastermind is more than a match for the police, outsmarting them at every step. It's not long before Luther is back in the Bullpen, determined to steal a march on the killer before it’s too late.

　　Idris Elba回归BBC一台Luther受到观众热烈欢迎。这部电视剧在国内好评如潮—这部惊险的犯罪系列剧取景华丽，情节跌宕起伏，人物个性鲜明以及刺激的心理悬疑揭秘让观众大呼过瘾。

　　Idris Elba扮演的Luther是一名抓捕杀人犯的总督察，,在一起涉及儿童杀手的案件中,他遭受了精神创伤,而这也危机到了他的婚姻生活。在与各类杀人犯斗智斗勇的同时，他也要和他内心的恶魔作斗争。

　　成功事业的律师英格丽德（艾玛·阿普尔顿 Emma Appleton 饰）为约翰（科林·摩根 Colin Morgan 饰）辩护，后者被前女友指控跟踪。约翰是一名魅力十足且充满危险性的成功人士。他曾是英格丽德的客户，在赢得官司后，两人开始了一段恋爱关系。
　　然而，当英格丽德试图结束这段关系时，事情变得一团糟。剧情从英格丽德重新建立生活的时刻开始。在这个过程中，悲剧发生了，约翰再次出现，提出了一项耸人听闻、足以永远摧毁她的指控。在生活陷入困境的时刻，英格丽德感到迷茫，不知道还能相信谁。

　　British police officer DC Miranda Blake is in Mallorca to escort a known criminal back to the UK. When things don't go according to plan, her world is turned on its head and she decides to conduct her own investigation. Reluctantly paired with wise-cracking German detective Max Winter, Miranda works through Niall's gang, eventually meeting Niall's daughter Claire and ex-wife Stella. But when Claire disappears, things look like they're getting out of hand.
　　Feel-good drama about British police officer who joins forces with a wise-cracking German detective to fight crime on the picturesque Island of Mallorca.

　　第四季将采用不同的结构。在之前的季节中，每一集长篇剧集都会呈现一个新的谜题。而第四季将会在整个季节中讲述一个贯穿始终的故事。