Line Of Duty - Season 4 (DVD)

Thandie Newton joins the cast as DCI Roz Huntley in the fourth season of Jed Mercurio's critically-acclaimed police corruption drama.

In a career-defining case, Roz is under intense pressure from her superiors to apprehend a serial murderer after months of fruitless investigation. When a young man is charged, doubts around his guilt lead the chief forensic investigator to AC-12. Is Roz ignoring forensic evidence that might prove the young man's innocence? AC12's Supt Hastings places DS Kate Fleming undercover inside Roz's team and with DS Steve Arnott piling on pressure from the outside, Roz is forced to act decisively. A mother of two and wife to Nick, Roz will do anything to stop her life from unravelling.

As suspicions mount and the case becomes ever more complex, AC12 themselves come under threat.