Episode 1
Detective Superintendent Steve Wilkins reinvestigates one of Pembrokeshire's most notorious unsolved crimes, known locally as the Coastal Path Murders.
Episode 2
With Cooper's second parole hearing looming closer, Detective Steve Wilkins and his team face Cooper head-on in three days of interviews.
Episode 3
A long-awaited forensic breakthrough gives Detective Steve Wilkins and his team the ammunition they need to finally arrest and prosecute John Cooper.