For nearly nine years, Line of Duty gripped viewers as they tried to work out who the mysterious H is and who's a bent copper.
The award-winning show, which stars Martin Compston, Vicky McClure and Adrian Dunbar, first hit our screens in 2012. It follows the officers of Anti-Corruption Unit 12 (AC-12) as they investigate corrupt police officers.
Line of Duty catapulted its main cast - Adrian Dunbar, Martin Compston and Vicky McClure - to stardom, and seemed to tie up most of its loose ends in the finale of series six.
Despite this, fans are still holding out hope for a return of the crime drama. Given that Line of Duty is one of the BBC's most successful programmes ever, it's not impossible that it could make a comeback.