BBC One 2017 Series: Line of Duty – Season 4
Line of Duty returns with a new season, on BBC One. The hit drama series about the investigations of AC12, a controversial Police Anti-Corruption Unit, premieres soon with six new episodes. Determined to uncover the truth, AC12 must work together to tackle their most devious opponent yet – DCI Roz Huntley.
“Who polices the police?” – is the question raised in the trailer released by the TV channel, revealing that the next case investigated by the AC12 revolves around a 24-year-old man has been charged with murder.
The third season ended with DS Steve Arnott arrested on suspicion of murder, continuing to protest his innocence.
The series stars Daniel Mays, Keeley Hawes, Martin Compston, Vicky McClure, Adrian Dunbar, Neil Morrissey, Craig Parkinson and others.