Season 3

Line of Duty

6 episodes

Episode 1

Sergeant Danny Waldron and his armed response team shoot dead a hardened criminal.

After the shooting at the drugs house, DC Fleming increases the pressure on Danny Waldron.

DS Steve Arnott believes there is a dark secret in Danny Waldron's past.

Fresh testimony launches AC-12 back on the trail of a corrupt officer.

Loyalties are divided when DS Steve Arnott comes under scrutiny from his colleagues.

DS Steve Arnott is arrested on suspicion of murder but continues to protest his innocence.