Line of Duty

A brutal ambush on a police convoy leaves three officers dead and a protected witness fighting for his life; AC-12 turns their spotlight on the officer who led the convoy.

Kate Fleming is planted undercover in Lindsay Denton's Missing Persons Unit.

Lindsay finds herself targeted in prison and tells Kate her theory of why she is being framed.

Lindsay is granted special dispensation to visit her dying mother.

Lindsay fights for her life against troubling details of a vicious conspiracy while Hastings comes under pressure to arrest his senior officer.

AC12's investigation finally exposes a vicious criminal gang run from within the police.