Murdoch and Inspector Brackenreid are aboard the SS Keewatin after the owner, Clarence MacFarlane, receives what he believes is a threat. The Keewatin is about to depart from Toronto on its maiden voyage destined for Rochester, N.Y. and Murdoch thinks they should stay on board, especially after he sees that Julia is one of the invited guests. Their presence proves useful after MacFarlane's daughter Amy, who is engaged to her father's chief financial officer Owen Mathers, falls overboard and is nowhere to be found. As Murdoch investigates he finds there is a real threat against the Keewatin and the true facts behind Amy's disappearance.

　　本剧原名《巴金命案 The Barking Murders 》，因视角专注于案件中逝去的生命而改名。
　　故事讲述真实发生过的埃塞克斯郡巴金区命案，以受害者家属的角度描述Stephen Port的一连串犯罪行为，和备受批评的警方调查过程。
　　强奸犯兼连环杀手Stephen Port在同志交友网站找寻目标，然后对他们下药及强暴，其中有四人因Stephen Port用药过量而死；然而当时头三宗命案明明有着相似性，但警方没有以「连环杀人」的方向调查，故此受害者家属认为警方也得对凶案一再发生而负责。

　　聚焦一个美国的死囚犯、一个安静的英国小镇上的牧师，以及一位被困在地窖中的数学老师，他们以最出乎意料的方式越过小径。图齐将饰演剧名所指代的中心人物，莫法特对该剧剧情高度保密，甚至故事的最终走向只有其本人知道。

　　夏洛克·福尔摩斯卷入了一场涉及宿敌莫里亚蒂教授的邪恶阴谋，最终与一位母亲最近被谋杀的年轻美国土著妇女阿米莉亚·罗哈斯联手。在他们合作破案的过程中，阿米莉亚也开始证明这位大侦探就是她失散多年的父亲。

　　Code of Silence introduces us to Deaf catering worker, Alison Woods. She’s struggling to make ends meet, juggling two jobs, in a police canteen and a local bar, while also doing her best to support her Deaf mum, Julie. When DC Ashleigh Francis calls on Alison to lip read the conversations of some dangerous criminals, she is plunged into a new and exhilarating world.
　　Alison’s interpretation of the gang's clandestine meetings quickly become key to unlocking the police investigation. But Alison's feelings about the case become complicated when she finds herself drawn to Liam, one of the main suspects. Alison knows she's putting herself at risk by agreeing to work with the police, and when things threaten to spill over into her personal life, she knows she should step away. But Alison can’t let go…

　　警探和嫌犯在气氛紧张的审讯室里展开一场场心理游戏。寻找答案有时需要付出道德的代价。

　　剧集聚焦扎克瑞·昆图饰演的查理·曼克斯——一个食用小孩子的生命气息来保持青春的超自然人物，在食用了孩子们的生气后，曼克斯把他们的身体储存在“圣诞乐园”。这是地个冰冷、扭曲、曼克斯想象中的圣诞村庄，在那里，每天都是圣诞节，不快乐是违法的，而孩子们渐渐变成食尸鬼一般的存在。艾什利·康宁斯(《费雪小姐探案集》《金翅雀》)饰演女主——一位来自新英格兰的少女维克·麦昆，她的出现威胁了曼克斯的整个世界。

　　80 年代初期的波兰小镇，一名妓女和青年组织领袖惨遭杀害。 警方着手调查此案，办案手法却引起两名记者的怀疑。