第四季依然由Reece Shearsmith和Steve Pemberton两位怪才领衔,主役,担纲,主角，依然是6集。
　　其中第一集叫"桑吉巴"，叙述,阐述,陈述,描写的伦敦一家叫桑吉巴的酒店第9层的故事，游客、妓女等形形色色的人都聚集在这里，出现,产生,形成,酿成了阴差阳错的事...

　　Bulletproof follows two cops, Bishop and Pike, as they chase down hardened criminals in London's East End. On the surface Bishop and Pike have a lot in common they are cool, smart, unapologetically street-wise and tough; they share a deep, fraternal relationship - and are always there for each other. However, they come from very different backgrounds and their personal motivations and emotional lives outside the police force differ as a result: Pike is an aspirational family man, the son of a decorated police officer who's determined to follow in his father's footsteps, but not be in his shadow. Bishop grew up in care homes and on the streets, and never knew his father. Despite these differences Bishop and Pike are bonded by the same moral code and work brilliantly well together even when the chemistry between them looks set to explode.

　　Leila偶然发现了隐藏在她最喜爱的虚拟现实游戏Azana中的「红色药丸」—— 一个绝密的天堂。妈妈,母亲大人,娘亲,老妈妈去世后，Leila陷入了深深的孤寂,寂寥,冷寂,寥寂,孤寂,寂寥,孤单感。所幸她为自己创造了一个数字身份「影疾」，可以在游戏世界中暂时忘掉烦恼。每当登入虚拟现实游戏Azana之后，她才感觉自己真正活着。在这个令 人惊叹的虚拟之地，Leila遇到了神秘的游戏角色Mania，她拥有Leila所没有的一切：欢乐,愉快,欢喜,欢乐,愉快,欣喜,喜悦,欢畅,喜悦,欣喜主义、任性、永不知足。当Leila发现秘密天堂「红色药丸」之后，「红色药丸」的领袖Adrian声称她不可以不请自来，然后将她的数字角色「影疾」赶出了游戏。第二天，Mania——或者说Mania的现实日常,生存,生计,日子身份Tess——竟然出现在Leila职业,事业,工作岗位,职责的地方，从此进入Leila的现实日常,生存,生计,日子，Leila的世界永远被转变,变化,蜕变,变迁了。Leila很快意识到，所谓的虚拟天堂不是神秘庇护所，也不是Adrian所声称的美满,美好,完美,美善之地。但她更想知道Tess/Mania究竟是怎么回事……