When Steve Arnott is transferred to the Police Anti-Corruption Unit, he finds his target is the city's top detective, Tony Gates. Can Gates really be as good as he appears? Arnott must engage in a cat-and-mouse struggle to uncover Gates' secret.
Having been duped into covering up Jackie's hit and run, Gates is desperate to sever ties with her. But as Arnott and Fleming close in on his secret, Gates is plunged into an even more dangerous situation.
Arnott is convinced Gates played a part in Jackie's disappearance. With Fleming's help, the anticorruption team try to trap Gates into revealing his involvement in covering up Jackie's crimes.
Desperate for proof of Gates’s corruption, Fleming pushes her relationship with him to the limit. But her behaviour causes Morton to question if she might not be such a loyal colleague after all.
With Gates on the run, the anticorruption team come under pressure to close the case once and for all. Arnott is forced to make some tough decisions about where his loyalties lie. Fleming and Hastings go all out to catch Gates, leading to a shattering conclusion.
A brutal ambush on a police convoy leaves three officers dead and a protected witness fighting for his life. Ted Hastings, Steve Arnott, and new recruit Georgia Trotman turn their spotlight on Lindsay Denton, the officer who led the convoy but escaped unscathed.
Matthew "Dot" Cottan
© 2011 World Productions (Line of Duty) Limited
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