一位有着不寻常爱好的盲人隐士、一位具有心灵传动能力的哑剧矮人、一位心怀怨恨的钩手小丑、一位痴迷连环杀手的成人儿童以及一位疯癫却充满关爱的助产士，都收到了一个不祥的消息：“我知道你做了什么。” 这五个看似没有关联的角色在过着他们充满黑色幽默的日常生活时，过去的故事也随之而来。

洛马克斯先生请求他的护理人员帮助，以完成他那不寻常的收藏。事情在一次误会后变得越来越糟，导致大卫和他的母亲不得不为他在谋杀之谜晚宴上的无能表现掩盖。罗伯特感到惊讶，因为黛比邀请他去吃晚餐，而助产士乔伊则在早晨小组中给大家普及了选择水中分娩的风险。

This episode reveals the story of how Mr Jelly, the one-handed children's entertainer, ended up the way he is. Mr Lomax travels to the private auction of Snappy the Crocodile in Dudley. David and his mum dispatch their next victim disguised as beauticians, and Robert wreaks his revenge on Debbie during a midweek matinee of Snow White.

David and his mum are mid-murder when an unexpected visitor throws them into panic. Who is the mystery caller? What will happen to the body in the trunk? And will Maureen finally get to try one of those pyramid teabags?

Midwife Joy is left alone with her demonstration doll Freddy when a Pinocchio-like miracle happens. David and his mum lure their next victim to a waxwork museum, and Mr Jolly explains to Mr Jelly the reason for the blackmail letters.

Robert uses Debbie's amnesia for his own ends. A battle of wills ensues with more than cross words flying through the air. Mr Jelly is entertaining an old people's home when a phone call from Mr Jolly plunges him back into danger. Maureen learns the truth about her killing spree. Mr Lomax has acquired a new home help.

All of the characters are drawn back to the scene of their crime. Who has summoned them there and for what terrible purpose? Meanwhile, Kerry takes Robert from the theatre to the heart of the deep, dark woods. Will anyone survive the great day of judgement?

《疯城记》 以长达一小时的万圣节特别鬼片回归。 随着外景经理菲尔-沃克（Phil Walker）对拉文希尔精神病院废弃废墟的调查，四个恐怖故事逐渐展开。 邪恶家庭教师埃德温娜-肯奇顿的鬼魂是否还在空荡荡的走廊里游荡？ 这些破败的墙壁里还隐藏着什么恐怖？

The survivors of the explosion at Ravenhill Psychiatric Hospital reunite to bury one of their number killed in the blast, but there is to be no rest for the wicked.

The search for the missing locket continues with the investigation turning to Christopher Biggins for answers. Meanwhile, we find out what happened to Robert and Kerry as we return to the mysterious cottage in the woods.

Mr Lomax reveals more about his past and his hatred for Tony Hancock becomes clear. Meanwhile Mr Jelly arrives at a booking meant to be for Mr Jolly and hopes no one will tell the difference.

Desperate measures are called for as Jeremy Goode searches for the missing library book. Mrs Wren is in peril from several parties and only one man can save her. But will he be bothered?

With danger mounting and few witnesses left, Tealeaf, with the help of Peter Bishop, tries to solve the mystery of the locket. Things don't quite go to plan. Elsewhere, once again Jelly becomes Jolly with unexpected results.

The secret of the missing locket is finally exposed and the enormity of what is at stake revealed. But are there enough characters left alive to care?