American PR consultant Liz Garvie is hired by Metropolitan chief constable Miller to help the police improve its image. At the same time documentary film maker Matt Coward is shadowing Territorial Support group officers Davina, Robbie and Clarkey at a not very well organized Kurdish protest where Robbie has to be reminded to tone down the abuse because he is on camera. Elsewhere officer Warwick accidentally apprehends an innocent woman whom he wrongly suspected was a drug addict. Liz's introductory speech is interrupted by news that a sniper is randomly shooting victims around the city, her disgruntled assistant Finn, annoyed at being passed over for promotion, almost wrecking her press conference. The sniper turns out to be an embittered divorcee and the Territorial Support group defy Miller's orders by locating and him and forming a stake-out, Warwick taking out the man - who is actually unarmed. Written by don @ minifie-1

Liz primes Miller for his committee speech whilst trying to pacify Warwick since the film of his shooting an unarmed man is posted on the Internet and he fears reprisals. There is a problem at Craven Wood young offender unit where the security firm Securamax has failed to curb what its director calls a disturbance since it would be penalized were it a riot. But a riot it is and the territorial support team is called in, still being shadowed by Matt, keen to turn his material into a film based on the team's personal problems. Miller is shocked to see that assistant commissioner Inglis is actually on the Securamax pay-roll and confronts him before appearing before the committee where deputy mayor Delgado accuses him of opposing private security firms being involved in police work. Liz supports him, quoting the Craven Wood incident, but he is still not happy. Written by don @ minifie-1

Eager to justify Commissioner Miller?s (James Nesbitt) faith in her, Liz (Brit Marling) presents her vision for Metwork: the force?s very own digital news channel that will rival established outlets and tell it like it is, for better or worse. It could be a game-changer but to Finn (Bertie Carvel) Metwork is a vanity project and he is determined to kill it. His opportunity comes on the eve of the Mayor?s Conference on Policing. With another clash with Deputy Mayor Grant Delgado (Ralph Brown) on the cards, a youth arrested for possession of drugs turns out to be Delgado?s son. Finn leaks the news to trump Liz?s big idea and ruin Delgado in the process. An indignant Liz (Brit Marling) helps Delgado save face unaware that she has rescued Miller?s most powerful enemy. Warwick?s psychological state reaches crisis point after the high-risk pursuit of a gang of armed robbers and firearms trainee Robbie (Adam Deacon) realises he must sharpen up if he is to make the cut?.

It?s Robbie?s (Adam Deacon) first day on the ARV unit and with Warwick (Nick Blood) clearly not fit for duty he discovers how far Banjo (Andrew Brooke) and Tony (Stuart Martin) will bend the rules to help their brother in arms. Liz (Brit Marling) faces a backlash when the police play down a bomb threat at a conference centre but news goes viral and threatens to cause widespread panic. Deputy Commissioner Charles Inglis (Paterson Joseph) finds that nobody is above the law when his arrest over a minor offence heaps further pressure on Richard Miller (James Nesbitt). And as Liz accompanies Miller to diffuse media tension at the bomb scene he confides in her that a journalist has a story ready to run that is infinitely more explosive for the force and its chief?

More shocking detail emerges around Commissioner Miller?s death and Liz (Brit Marling) is incriminated over the nature of her relationship with him. Finn (Bertie Carvel) concentrates his efforts on positioning himself as Acting Commissioner Inglis? (Paterson Joseph) consigliere and sidelining Liz in her own department. While police on the streets can only speculate about the extraordinary events higher up the food chain, the fugitive bomber is located and Assistant Commissioner Sharon Franklin (Nicola Walker) is despatched to take the reins on the scene of a house-to-house search. As Banjo?s (Andrew Brooke) suspicions mount over Davina?s affair his agitation starts to affect work. When the ARV team is called to attend a nightclub after reports of a gun, the incident takes a disastrous turn as a black youth is fatally wounded?

Whilst his colleagues go mad at a paint-ball day Robbie broods over the forthcoming enquiry into the night club shooting and, following Miller's funeral, Inglis declares his attention to apply to be his replacement. Liz prefers Sharon, getting her to spearhead the - ultimately unsuccessful - case of a missing toddler and backing her campaign whilst attempting to discredit Inglis by exposing back-handers. The enquiry goes badly, exposing the other officers' attempts to cover for Warwick's fragile mental state and throwing doubt on their account of the shooting. Robbie foolishly confides in Matt Coward, who is planning a hatchet job on Robbie and the unit in his forthcoming film whilst Banjo finds further evidence of Davina's affair with Clarkey. Written by don @ minifie-1

Warwick is suspended but his colleagues return to duty. However CCTV footage of Banjo viciously stamping on a rubbish bin causes public outrage and there are riots and lootings all over the city. Feeling unsupported by their superiors the armed response unit strike, followed by the TSG but Inglis gets them back to work with a down-to-earth, sympathetic speech. Liz is impressed and switches her allegiance from Sharon to Inglis, who ends up getting the commissioner's job and helping quell the riots. Learning of his betrayal by Matt Coward Robbie leads a raid on the journalist's flat and plants dope on him as a lever to retrieve the incriminating footage. However fellow officer Tony, not wanting to get involved, gives the film to Liz, who persuades Inglis to make it public, thus showing police openness and refusal to cover up corruption. Robbie is arrested, along with Banjo, leaving Clarkey with a clear field for Davina. Written by don @ minifie-1