AC-12 have uncovered a criminal network operating within the force, and DCC Dryden is charged with conspiracy to pervert the course of justice. While DS Arnott is convinced that DI Denton was set up, DC Fleming is determined to prove her guilt.moreless
While DI Denton fights for her life, DS Arnott uncovers new information about her personal life. Now convinced of her innocence, he risks his career to pursue a high-level target.
With the officers from AC-12 under pressure to identify the police mole, DI Denton implicates DCC Dryden in a conspiracy, but has she put herself in danger?
Lindsay Denton is remanded in custody, and is seriously assaulted in prison. Matt Cottan, now a DI with AC-9, is seconded to help with the investigation into the attack on the convoy, discomfiting both Arnott and Fleming. The team is concerned at the absence of any apparent connection between Denton and the victims. Elsewhere, the mutilated body of a teenaged girl is discovered.moreless
Still reeling from the events at the hospital, Steve Arnott continues the investigation into DI Denton, while she and the undercover Kate Fleming look into the disappearance of a 15-year-old girl. The tenacious Denton also carries out her own investigation into the backgrounds of the team from AC-12, and it appears that their conduct might compromise the case against her.moreless
A police convoy is ambushed, leaving three officers dead and a protected witness on the critical list. AC-12 is called on to investigate the possibility of a leak from a police source. As the only officer to survive the attack, DI Lindsay Denton is a valuable witness, but she is soon identified as the prime suspect.moreless
DCI Murray is brought in to advise on a rape and murder case that duplicates the M.O. of a serial kiler she helped convict 13 years before. Rachel is told that ex-lover Nick Savage will not be charged with her attempted murder, and is shocked to discover that her brother Dom is working as a prostitute.moreless
Martha confronts the biggest case of her life as she represents teenager Mark Draper again, this time he's accused of killing a judge. Meanwhile, Nick and Niamh's future at the firm is decided.moreless