The Commander - Blackdog (Part 1 of 2)
First aired: May 31, 2018.
Deputy Chief Constable Stephen Blackton (David O'Hara), known as 'Blackdog', who has a well-deserved reputation for pursuing corrupt police officers, is called into the Met to re-open the investigation into the police shooting of Lionel Cripps. Having been working on the case at the time of her affair with James Lampton, Blackton is also forced to review Commander Blake's relationship with the accused. Although a coroner's enquiry found no fault in Cripps' shooting, Blake raised doubt as to DCI Mike Hedges' role in the investigation and the possible editing of the CCTV footage of the incident to remove footage of person or persons unknown.