Andy Wilson

Reid is adrift - his team in pieces and Leman Street shaken to its foundations following recent events. A kidnapping offers him cause to assemble his men and tackle the white slavery ring operating in their midst. But Reid is gripped by a growing obsession that this leads back to a terrible secret from his own past.

The brutal clearing of a local slum for the underground railway reveals an almost indecipherable murder scene and an unreliable slum girl witness. Lucy Eames, beautiful and disturbed, is the unlikely key to a byzantine web of conspiracy.

As Reid and Drake find themselves powerless to resist the awful temptation of a final reckoning with K Division's Jedediah Shine, so Jackson and Judge's ever more desperate attempts to profit from that stolen diamond lead them into the teeth of the murderous agents of the De Graal monopoly.

Captain Jackson's reckless and untrustworthy elder brother arrives in Whitechapel carrying a valuable uncut diamond. Reid and Flight are drawn to the plight of a local craftsman defrauded of his income by a long-firm scam. Long Susan finds herself powerless to resist the ever-encroaching influence that Silas Duggan is determined to exert on her life.

Four years have passed. Time that has seen Reid, Drake and Jackson split and isolated from one another. But when the robbery of a goods train leads to a cataclysmic locomotive disaster on Leman Street itself, the men and their resentments, are reunited to seek its cause. Meanwhile, Long Susan has made good on her promise to take control of Obsidian Estates, and has turned it into a legitimate business of huge philanthropic ambition. But such aspirations...

Sinbad returns to Basra to rescue his grandmother.

The crew are captured by Water-Thieves, a feral tribe.

Sunny makes further investigations into David Walker's life that suggest he was a troubled man with a number of issues. Marion has a prickly chat with Cassie about her past and the inquiry reveals her close relationship with an IRA activist. As the police investigation encroaches on their life, Sara and Colin open up to their partners with secrets about their past.

When the remnants of a body are found hidden in a river, DCI Cassie Stuart and DI Sunny Khan are faced with an impossible investigation. There are four suspects - they are the pieces of the jigsaw Cassie and Sunny must solve. But the harder they try to put this picture together, the more blurred it becomes. It's a case that will test their relationship in unexpected ways, and question their assumptions about the most damaged and destructive in society....

Cassie turns her attention to Brentford house and the theory that one or more of the suspects may have been abused at the gatherings there. Marion is questioned again after Sinead's allegation that David could have been an IRA target. The detectives also look further into the accusations made against Colin while he was working in the city - but something does not quite seem to add up. Was his alleged victim telling the truth - and if not, why would...