Part One: Nadir comes back to work in a relieved state after Meadows all but admits defeat in their search for Kristen Shaw. However, he is brought back to earth with a bump when Gold reports Harman missing to Meadows, with her last phone call coming on the day Eva Garcia disappeared. And, when the team discover the woman who boarded her flight to be an imposter, a search is duly organised. With phone signals pinging at Bonham Wharf, Nadir panics that he is about to be caught and, after tracking down Shaw, they plan to flee, but his behaviour starts to arouse Meadows and Hunter's suspicions. Meanwhile, Keane and Hardy find a heavily pregnant female at the bottom of a flight of stairs after an apparent burglary, but it appears her partner may be implicated when it is revealed her stolen watch was originally stolen in another burglary, involving Heaton's estranged wife Rhiannon.

Part One A family event to mark the one year anniversary of Amy Tennant's disappearance is disrupted when her father James gets into a fight with Shelley Fitzgerald, Amy's late mum's best friend who accused him of killing her when she first disappeared. Her behaviour sufficiently arouses Manson's suspicions, and a raid on her late father's allotment leads to the discovery of a body, but it turns out to be her own daughter Clare, who died as a baby. Despite Manson's concerns over her mental health, she is bailed, only for Turner to find new evidence that blows the case wide open. Elsewhere, Turner and Walker investigate a case of bigamy involving a witness in the Tennant case, and Noble and Keane deal with a bizarre RTA involving a flock of stolen sheep.

Part One- Sticky Fingers: Ackland's hopes of a quiet exit from Sun Hill are scuppered when Aldbourne Estate resident Frank Harris assaults property developer Brian Stevens. Ackland is skeptical when Harris accuses Stevens of corruption. An insider gives her evidence to suggest there is more to Frank's allegations than she expected. A series of high-level arrests lead to nowhere but a lecture from Hobbs to Heaton about arresting council official Jerry Davis. With all avenues covered, Ackland thinks she's found the vital evidence on CCTV, but she is rammed off the road delivering back to the station. Elsewhere, a woman arrested with stolen property is tied to a scam involving a man living above a travel agent's. Wright and Noble investigate how he gained access to the agent's data.

Part One- The Party is Over: Jim Carver, now a DS with Greater Manchester Police, shows up at Sun Hill to track down drug dealer Pat Hadley, whom he has been trying to catch for eighteen months. Ackland is not best pleased to be spending her last day at Sun Hill with her ex-husband, but puts her qualms to one side as the pair investigate Hadley's right-hand man, Greg Burns. Burns provides info on a raid but it goes belly up, leaving the pair in grave danger. Elsewhere, Hollis and Hardy investigate a decomposed skeleton found on railway lines, and attempt to track down some stolen medals, leading Hardy to the home of his girlfriend's younger brother.

Part One- Blood Money: Nixon, Wright and Noble deal with a young woman who was pushed from a walkway on the Cole Lane Estate, and are then called to deal with the attempted suicide of the woman's husband. Further digging reveals the man to be in debt to a known criminal; a sting is set up to trap him, but it goes wrong, resulting in an armed standoff. Wright and Noble are called to a disturbance at the woman's flat the next day, but she has disappeared without trace. Meanwhile, Webb deals with an assault, which leads Perkins, Stamp and Casper to go undercover to trap a confidence trickster.

Part One: Kapoor and Stamp discover the body of a supermodel who had recently fronted an anti-fur campaign despite her lack of real conviction. Hart notes that the crime scene has been arranged to resemble a shot from the film, suggesting animal rights activists may have resented her hypocrisy. Subsequent investigations reveal a host of rival male admirers with reason to kill her and Perkins digs up evidence of a more sinister side to the woman's life – a porn film with footage of a missing 15-year-old runaway being at the dead woman's house. Meadows prepares to testify at the trial of disgraced detective Zain Nadir. Turner makes a move on crime scene photographer Rachel Inns.

Part One: Newly transferred PC Sally Armstrong arrives at Sun Hill, alongside young probationer Billy Rowan, where the team are anxious to find the man who stabbed Doug Wright. Paired with Wright and Keane, the foursome attend the raid on a suspect in Doug’s stabbing, with Rowan heroically detaining the man when he resists arrest. They later get called to attend a disturbance at a jewellery shop, where Rowan helps Armstrong nail a thief who swallowed a ring. After another successful result, they are later called on to deal with a report of stone-throwing at an abandoned factory – where an ambush leads to Rowan's first day becoming his last.

Part One - Man Down: Hardy ends up spending the day with Dominic and members of the Sken gang after his suspension for the events of the night before. After being caught up in a kidnapping and the resulting revenge shooting, Hardy acts as courier to deliver the kidnap victim in return for a stolen gun. When an investigation Webb and Walker conduct into stolen explosives reveals the Skens are buying, Heaton sets up a sting. Hardy attends along with Dominic and two Skens, later blowing the op after seeing an unmarked CID car. When Valentine finds Hardy fleeing and confronts him, a Sken demands Hardy shoot his best friend, or he’ll shoot both of them.

Part One: Fletcher and Smith deal with a missing person's case. The victim, a 16-year-old girl, is found dead at the bottom of a fire escape. Fletcher is assigned as FLO. Investigation reveals the girl was on a downward spiral. Her boyfriend is arrested due to a serious assault in his past, but the investigation takes a gruesome turn when Fletcher discovers a horrifying video clip given to him by her best friend.

Part One: Hollis is stabbed whilst responding to reports of a prowler on the Aldbourne Estate, but he manages to stop an attack on a local mother, Shelley Cooper. Manson and Dasari lead the investigation and discover Cooper lives on the same floor as a recently released man, Michael Simms, a paranoid schizophrenic that Manson jailed four years prior for attacking a woman. Stone draws reference to Cooper's resemblance to Simms' previous victim, leading to a clash with Manson. Enlisting the help of Simms' psychiatrist, Julia Bickham, Manson's digging leads to Simms being exposed and attacked. With pressure on him, spearheaded by Cooper's ex-boyfriend Chris Ramsden, Simms snaps and abducts Cooper. When her son Jas comes between Simms and Manson during negotiations, a gunshot rings out in the chaos. Meanwhile, Smithy deals with a community leader causing havoc whilst protesting the traffic on the Aldbourne, but later uncovers a shock link to the prowler attacks.

Part One: Wright and Stamp investigate a suspected racial assault. Heaton suspects that three racists from a supremacist gang, The Bulldogs of Patriotism, are responsible, but Masters is sceptical: she and Perkins subsequently discover the victim was whipped. His wounds and a bandaging makes Masters think that his mother knows something, and she says it was his father who gave the beating. Meanwhile, Noble and Stone investigate a break in at the office of local MP Paul Sagger, but does the assault victim know more about it than he should? Sun Hill later patrol a concert, Rock Against Racism; things turn ugly when Sagger and Nadim Mura, the event coordinator and the assault victim's uncle, are shot as they appear on stage.

Part Two: The team are left dealing with the fallout of the shooting at the Rock Against Racism concert. Nadim Mura gives Heaton a name, Abdul Muntaqim, but dies due to a bullet in his lung, while Paul Sagger survives with a shoulder wound. Ahmed Hassar is questioned but denies involvement, although he confesses he set off a firecracker, which solves the mystery of four gunshots but only three shell casings. Masters and Perkins arrest a hospital porter, a member of the Bulldogs, who might have been responsible for killing Mura in hospital; he is not responsible as Mura's post-mortem reveals he was killed by a heart attack, but it's not in vain, as the uncover a conspiracy where the Bulldogs were going to kidnap Mura. Heaton continues the investigation into Sagger's alleged artefact smuggling, but the artefact, an ornamental dagger, which Sagger uses as a letter opener, has gone missing. Dasari makes a breakthrough, and identifies the name Heaton was given by Mura as Haqim Abd Al-Muntaqim; she and Manson go on to discover that Heaton was the target for the third bullet, but, as the DI calls to warn the Super, two bullets go through his car as he takes Sagger back to Sun Hill.

Part One: Disgraced ex-detective Zain Nadir is interviewed by Meadows about drug trafficking in Hayesend Prison, where he is serving ten years for perverting the course of justice, after Stone and Fletcher discover the body of a drug addict recently released from the prison. He reluctantly agrees to help his former colleagues infiltrate the gang involved, but Meadows is not sure whether he can trust him. He suspects his fears have been proved true when a riot breaks out just as the police move in to arrest the operation's kingpin, and Nadir’s cellmate, Jason Forbes, who makes good his escape in the confusion.

Part One: Perkins receives a tip-off regarding an armed robbery from an old informant, and pairs with new DS Max Carter, a transfer from SO19, to investigate it. When a car stolen in front of Armstrong and Gayle is linked to the robbery, Perkins discovers the thief is his informant’s son. When the informant goes in as the inside man, he is sussed and shot by ringleader Jimmy Duncan, and later dies in Perkins’ arms. When Stone and Fletcher attend a report of a drunk man refusing to leave a pub, they find Perkins drowning his sorrows. Meanwhile, Armstrong and Gayle arrest two girls for failing to pay their cab fare; suspecting them of being drug mules, a search of the home of the cab driver who confiscated their bags uncovers a poisonous snake. When their release is delayed, their boyfriends arrive and take drastic action.