Will this season’s finale of Line of Duty live up to the suspense of the last one? You’ll have to tune in to find out, though if the teaser trailer is anything to go by, it could all culminate in a dramatic shoot-out at the headquarters of AC-12 (the police anti-corruption unit at the centre of the series). In tonight’s episode, Nick (Lee Ingleby) faces lengthy questioning before being charged with Tim Ifield's murder. The AC-12 team believes Roz (Thandie Newton), who actually framed Nick, was also involved, but the detectives are running out of time to prove their theory. Adrian Dunbar, Martin Compston and Vicky McCLure also star.