D & P find a well near to the home of the Chief Constable and discover a car jack from a Bristol and the plastic the body was wrapped in. When confronted, the CC confesses to killing his ex wife with the car jack after an argument over the new girlfriend. Pike covered it up as the CC had covered up for Pike after he killed Charlie's mum.
D hears Parvez's voice in the squad room and they visit his grave at the end
Glad I am not the only one who falls asleep before the end of programmes!!