The wait is nearly over: Season 6 of our favourite police procedural is imminent, with a March 2021 screening promised. Though no new locations have been revealed yet, shooting has been sighted across the series’ adopted city of Belfast. While we await more details, catch up on the highlights of Seasons 1-5 on BBC iPlayer, and continue reading to find out more about where the previous seasons were filmed. Line of Duty - Season 6 BBC/WorldWhere was 'Line of Duty' seasons 1-5 filmed? Of the many mysteries posed by the BBC’s gripping and wholly addictive Line of Duty, one stands apart.