"With DCI Gill Murray in retirement, ever-ambitious Rachel (Suranne Jones) returns from her Vice secondment fired up and full of new ideas and initiatives. She’s gained valuable experience and really wants to make her mark as she returns to Syndicate 9’s Murder Squad. 　　Exhilarated to step up to the plate, Rachel is exactly who Janet (Lesley Sharp) and the Squad need to move forward with a terrifying and sinister Internet crime investigation of epic scale and unrelenting horror. Using her Vice authorisation, Rachel accesses a disturbing world where people brag about committing murder and lay down the gauntlet for the next victim. A game of ruthless life or death daring develops, as Scott & Bailey investigate multiple killers with horrifying and everlasting consequences. They will be changed forever and the investigation will take a devastating toll on their private, professional and personal lives." 　　The drama will be executive produced by Nicola Shindler (Happy Valley, Last Tango in Halifax, Banana, Cucumber) founder of the Red Production Company and produced by Michaela Eccleston, Red’s Head of Production. 　　Suranne Jones, who conceived the idea for the drama with fellow actress Sally Lindsay, will also executive produce alongside Nicola. Sally Lindsay also returns to the drama playing Rachel’s sister Alison. 　　5-1 Rachel steps up to acting DI on a case that becomes more sinister than it first appeared.

"With DCI Gill Murray in retirement, ever-ambitious Rachel (Suranne Jones) returns from her Vice secondment fired up and full of new ideas and initiatives. She’s gained valuable experience and really wants to make her mark as she returns to Syndicate 9’s Murder Squad. 　　Exhilarated to step up to the plate, Rachel is exactly who Janet (Lesley Sharp) and the Squad need to move forward with a terrifying and sinister Internet crime investigation of epic scale and unrelenting horror. Using her Vice authorisation, Rachel accesses a disturbing world where people brag about committing murder and lay down the gauntlet for the next victim. A game of ruthless life or death daring develops, as Scott & Bailey investigate multiple killers with horrifying and everlasting consequences. They will be changed forever and the investigation will take a devastating toll on their private, professional and personal lives." 　　The drama will be executive produced by Nicola Shindler (Happy Valley, Last Tango in Halifax, Banana, Cucumber) founder of the Red Production Company and produced by Michaela Eccleston, Red’s Head of Production. 　　Suranne Jones, who conceived the idea for the drama with fellow actress Sally Lindsay, will also executive produce alongside Nicola. Sally Lindsay also returns to the drama playing Rachel’s sister Alison. 　　5-1 Rachel steps up to acting DI on a case that becomes more sinister than it first appeared.

TNT宣布续订《重案组》第五季10集。

D.C. Rachel Bailey在辛迪加即曼彻斯特谋杀专案组工作9号工作。 　　工作时她是个优秀的警察，但是处理工作以外的事情她就玩不转了。我们看到她时，男友Nick Savage吃饭时当众把她甩了。男友说他要离开。Rachel狠揍了Nick两下，但是看得出她确实内心伤的很深，尤其是当她怀疑Nick有外遇的时候。Bailey最好的朋友Janet Scott当时也在那里，一如既往的在第二天全力投入到工作中。

D.C. Rachel Bailey在辛迪加即曼彻斯特谋杀专案组工作9号工作。 　　工作时她是个优秀的警察，但是处理工作以外的事情她就玩不转了。我们看到她时，男友Nick Savage吃饭时当众把她甩了。男友说他要离开。Rachel狠揍了Nick两下，但是看得出她确实内心伤的很深，尤其是当她怀疑Nick有外遇的时候。Bailey最好的朋友Janet Scott当时也在那里，一如既往的在第二天全力投入到工作中。

DCI Gill Murray, DC Janet Scott, DC Rachel Bailey find themselves working alongside the formidable DCI Julie Dodson when two badly burned bodies are found in remote woodland.

Janet is promoted to sergeant but steps down to give it to Rachel as she feels she is needed more at home. The pair join the search for eighteen year old Robin McKendrick, a simple lad reported missing by his boss, landlord John Rivington. Pub regulars are unforthcoming until a boy called John tells Janet that an ex-soldier known as Jackie-Boy locked Robin in his car boot as a cruel prank. He later reported the car as stolen. Another witness claims that Jackie- Boy dumped his car in a quarry with Robin still in the boot. In the process of the investigation Gill identifies another body found in the river, that of Mandy Sweeting, who disappeared two decades ago.

Janet is promoted to sergeant but steps down to give it to Rachel as she feels she is needed more at home. The pair join the search for eighteen year old Robin McKendrick, a simple lad reported missing by his boss, landlord John Rivington. Pub regulars are unforthcoming until a boy called John tells Janet that an ex-soldier known as Jackie-Boy locked Robin in his car boot as a cruel prank. He later reported the car as stolen. Another witness claims that Jackie- Boy dumped his car in a quarry with Robin still in the boot. In the process of the investigation Gill identifies another body found in the river, that of Mandy Sweeting, who disappeared two decades ago.