Line of Duty - Season 3 is a Crime, Drama, Thriller TV Series whose creator is Jed Mercurio. It was released on 24 Mar. 2016. It stars Adrian Dunbar, Martin Compston. The season begins with: When a criminal is shot dead by a police armed-response unit led by Sgt Danny Waldron, AC-12 gather evidence suggesting it was a deliberate killing rather than self-defence… What await ahead?