Martin Compston

Witness to a murder, Gates realizes he has more to cover up than his own misdeeds. Meanwhile, an increasingly confrontational Arnott closes in on Gates, prepared to take more and more risks to bring him down.

With Arnott off the case, Fleming plays on her relationship with Gates in an effort to uncover the truth. In the process, she brings on herself the attentions and suspicions of Gates's loyal lieutenant, DC Morton.

Tensions erupt between Hastings, Arnott, and Fleming as they decide on the next steps in the case. Increasingly desperate and unwilling to await his fate, Gates goes on the run, ready to play one last card.

In postwar Germany in 1946, Rachael Morgan arrives in the ruins of Hamburg in the bitter winter, to be reunited with her husband Lewis, a British colonel charged with rebuilding the shattered city. But as they set off for their new home, Rachael is stunned to discover that Lewis has made an unexpected decision: They will be sharing the grand house with its previous owners, a German widower and his troubled daughter. In this charged atmosphere, enmity...

In the thick of a career-defining case, Roz is under intense pressure to prove herself to her superiors. But when she faces conflict with a colleague, it's not long before AC-12 decide to probe her handling of the investigation.

Season two has Lindsay Denton, a member of AC12, a police anti-corruption unit, charged with investigating an ambush of a police convoy.

When Lindsay is given a special dispensation to leave prison to visit her dying mother, AC-12 realizes too late how much danger she may be in.

Lindsay Denton sets out to clear her name, while Arnott and Hastings interrogate Bains on suspicion of murder.

When Arnott's inquiries lead him to be suspended, he must team up with an unlikely partner to open his colleagues' eyes to the possible corruption within their own department.

As the evidence mounts against them, Danny's squad members close ranks. Then DS Arnott makes a shocking discovery that could change the focus of AC-12's inquiries.