Written by Jed Mercurio, the new six-part series begins at 9pm on Wednesday 12 February on BBC Two.

Series 2 opens with the ambush of a police convoy in which three police officers are killed and a protected witness seriously injured. The sole surviving police officer is Detective Inspector Lindsay Denton (Keeley Hawes). Deputy Chief Constable Mike Dryden (Mark Bonnar) takes personal charge, assigning AC-12 to the case. Detective Sergeant Steve Arnott (Martin Compston), Detective Constable Kate Fleming (Vicky McClure) and Superintendent Ted Hastings (Adrian Dunbar) are joined by newly appointed Detective Constable Georgia Trotman (Jessica Raine) to investigate a complex case rich in unexpected twists and turns. Initially AC-12’s most valuable witness, the suspicion soon arises that DI Denton could be their prime suspect.

> Buy Series 1 on DVD on Amazon.

> Buy Series 2 on DVD on Amazon.

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