Line of Duty

After the shooting at the drugs house, DC Fleming uses her undercover role to increase the pressure on Waldron's armed response unit.

DS Arnott believes Waldron compiled a list of his childhood abusers, but DI Cottan's commendable investigation casts a long shadow over his efforts.

Fresh testimony puts AC-12 back on the trail of "the Caddy," a corrupt cop with links to organized crime.

AC-12 faces divided loyalties when Arnott is suspended from duty.

Arnott is arrested on suspicion of murder, and DC Fleming's undercover operation may hold the key to his innocence.