Murphy's Law

When Guthrie is fatally stabbed in an alleyway, Murphy cancels his holiday to investigate. She was working undercover in the case of three murders of homeless women. Murphy in turn poses as a homeless man to find what the press is calling the return of Jack the Ripper. He takes up residence in a homeless shelter and befriends a teenaged refugee who may have witnessed one of the killings. He also has his eye on resident counsellor and religious advisor, Reverend William Norris.

Murphy is assigned to a drug squad headed by Nic Winters after one of Winters' team, Aaron Parmer, commits suicide. There is a concern that race may have played a part. Soon after joining, Murphy concludes that racism isn't the problem: he suspects Winters of skimming some of the seized drugs. It becomes apparent that the entire squad is on the take and when a second DC is killed, Murphy begins to wonder to what extent Parmer's death was genuinely suicide.

Murphy finds himself going undercover with INTERPOL to smash a car smuggling ring run by Godfrey Raines with his son and daughter. Murphy manages to convince Raines that he too is a car thief specialising in high-end vehicles. He soon realizes that INTERPOL is after something else when they delay arresting Raines and start questioning about arms shipments. Into the picture comes former MI6–turned–criminal Mr Davidson.

Murphy goes undercover at a defence biotech contractor that may be covering up an industrial accident. Specifically, a young child is found to have drowned but the mother believes he died as a result of a chemical agent in the pond near where the child was playing. Despite being warned off the case, the police leave Murphy in place. When the family who helped the dead boy and his mother is executed, it becomes apparent that someone will stop at nothing to keep these secrets hidden.

Murphy goes undercover in a convent when a young nun apparently commits suicide and a second vanishes. Posing as a priest, he finds any number of suspects. The older nuns obviously have a secret and are in league with a pharmaceutical firm. Murphy suspects they may be participating in illegal or unauthorised drug trials in their African mission.

Murphy finds himself before a disciplinary review board after having shot a suspect during an arrest and soon out of the force completely. He approaches psychologist Mark Maddison, who runs a support group for individuals who have have lost someone to violent crimes. In fact, Murphy is undercover as at least three suspects have been killed and all had some connection to a member of the group. However, Murphy's loyalties are torn when they provide him with the identity of the man who killed his daughter years earlier.

Murphy is out posing as a criminal armourer to make an arrest. During the set-up he recognises Caz Miller, a man known for his connections to criminal gang leader and known cop-killer Dave Callard. Miller tells Murphy that he wants to kill another gang member called Richard Holloway. Murphy stops the planned arrest because he thinks he can gain Callard's trust and infiltrate the entire criminal organisation to take everyone out.

Callard recommends Murphy to the McGeechan brothers. They plan to reactivate some assault rifles, but won't tell Murphy why they need them. Murphy knows they plan something big, but first he has to make sure his cover isn't blown.

Murphy tries to get counterfeit Euros for Callard, and asks fellow undercover officer Jill Calder for help. She has infiltrated an organisation that is printing the fake money. Together they try to set up a deal for both their clients and plan to make the big arrest during the handover.

After months spent trying to nail gangster Dave Callard, suddenly Murphy has a bigger fish to fry: a wealthy hotelier called George Garvey with a taste for ethnic art. Murphy bumps into someone to whom Garvey's son owes a lot of money and manages to get closer to Garvey. To forget the pressure during work he starts to drink. It looks like only Ellie can save him now.

The operation against Callard builds to its conclusion as Murphy is hired to help complete a shipment of Afghan heroin into England. His undercover work could help secure the conviction, but Murphy's presence is demanded elsewhere, as a key prosecution witness in the High Court.

Callard starts systematically destroying the forensic evidence. Murphy and Miller fear that he may want to destroy one or both of them too.

Murphy is called back to work after a leave of absence to be at his mother's side. His new job is to attempt to get close to Drew and Billy Johnstone, vicious Belfast criminals now operating in Leicester. Murphy thinks he's found himself a way in when a drug deal goes awry.

Working deep under cover, Murphy manages to gain the trust of Billy Johnstone, while trying to uncover the associations between his brother Drew and a local Asian criminal network.

Murphy ends up being exposed and caught up in a vicious and final showdown between brothers Drew and Billy Johnstone.

Murphy is working as a cover officer for an old friend, Mitch, and his fellow undercover officer, Kim. However, there are tensions between the two undercover officers and when they go missing Murphy is determined to find them.

With Mitch dead and Kim still missing, it's time for a heavily guilty Murphy to go undercover in the hope of finding Kim before it's too late. What awaits him is a world of people trafficking, drug smuggling and unwilling prostitution.

Now that Baker knows Murphy is a cop, he must race against the clock to find Kim before her secret is revealed too. However, local Chief Superintendent Bowry cares less about Kim's life and more about his own reputation and funding, and Murphy is forced to take desperate measures in his hunt for his missing friend.