Speaking in September 2018, series creator Mercurio said: “With Line of Duty we’re shooting series five now, and series six has been commissioned which we’re gonna shoot hopefully in the next couple of years.
“So yeah Line of Duty should be on air, series five early in 2019.”
Star Martin Compston revealed in December that he expected the new series to air in April 2019.
“I think round about April probably,” he said on ITV’s Lorraine. “We just finish it and then we hand over to the BBC scheduling gods, but I think April has sort of been the time that they normally put it on.”
He revealed: “There are things we haven’t done before, characters we haven’t seen before and that I think’s part of the construction of the series.”
Who will star in series five?
Adrian Dunbar, Vicky McClure and Martin Compston are confirmed to be reprising their roles as the officers of AC-12.
Line of Duty usually has a guest star as the focus of each investigation – previous series have seen Keeley Hawes and Thandie Newton among those to come under scrutiny – but season five’s casting is yet to be announced.
Sign up to the Radio Times newsletter for the latest TV and entertainment news