Brought to you by the producers of global hit 'Bodyguard', true crime drama 'The Pembrokeshire Murders' brings to life the extraordinary cold-case pursuit of the most notorious serial killer in Welsh history. Two unsolved double murders from the 1980's and an unsolved violent assault on five teenagers in 1996 cast a long shadow over the work of the Dyfed-Powys police force. In 2006, newly promoted Detective Superintendent Steve Wilkins (Luke Evans) decided to reopen all three cases. Employing pioneering forensic methods, Wilkins and his handpicked team, Operation Ottawa, linked the murders to a string of burglaries committed in the 80's and 90's. The perpetrator of those crimes was nearing the end of his prison sentence, but if Steve Wilkins was right, he was also a serial killer...Could Steve and his team unearth enough forensic evidence to charge their suspect before he was released to potentially kill again?