The BBC has announced further casting details for the return of Jed Mercurio's hit crime thriller Line of Duty, with Tom Weston-Jones set to play Detective Inspector Dominic Gough, leader of Tactical Operations Unit 7 (TO-7). The series seven will be produced by World Productions for BBC iPlayer and BBC One and will be filmed in Northern Ireland. Additional cast members include Laura Aikman, Levi Brown, and Amy Leigh Hickman. The series is written and created by Mercuria, with episodes 4-6 being directed by Jennie Darnell and Ken Horn.