Line of Duty

Following the deadly hijack of a police convoy, AC-12 target a ruthless organised crime group known to have links with corrupt officers.

A fresh police leak enables another audacious raid, Arnott's attempts to gather information put him in a dangerous situation, and the team tries to contact the undercover officer.

Corbett's most daring plan yet requires McQueen to exploit links with corrupt police officers. AC-12 make a shocking discovery.

Tensions rise in the OCG following the events at Eastfield. With troubling questions hanging over the identity of 'H', suspicions mount at AC-12.

As the hunt for 'H' intensifies, Steve and Kate wonder if Hastings is guarding a dark secret.

In a nail-biting finale, closely guarded secrets are revealed.

Carmichael's dogged interrogation of Hastings presents mounting evidence of suspicious behavior. Caught in the crossfire, Kate and Steve are torn between loyalty to Hastings and their duty to uncover the truth, however painful. Will the identity of "H" be revealed at last?