Cracking the case?

Can AC-12 unlock one last clue and solve Operation Lighthouse?

- HANNAH DAVIES, TESS LAMACRAFT, CAREN CLARK

LINE OF DUTY Sunday, 9 pm BBC1 Drama

The clock is ticking for AC-12 in the explosive series finale of BBC1 crime thriller Line of Duty.

While the anti-corruption unit is looking likely to be disbanded, Superintendent Ted Hastings (Adrian Dunbar) is facing imminent forced retirement and DI Steve Arnott (Martin Compston), who’s secretly addicted to painkillers, could be risking suspension if he continues to avoid having a medical review.