Line of Duty

When Steve Arnott is transferred to an anti-corruption unit, he finds his target is the city's top detective, Tony Gates. Can Gates really be as good as he appears?

Having been duped into covering up Jackie's crime, Gates is desperate to sever ties with her. But Arnott and Fleming are closing in on his secret.

Arnott is convinced Gates played a part in Jackie's disappearance. The anti-corruption team try to trap Gates into revealing his role 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 her loyalty.

With Gates on the run, the anti-corruption team come under pressure to close the case. Arnott is forced to make some tough decisions about where his loyalties lie.