Three murders - unsolved but never forgotten. Thirty years on, can DCI Bethall find the serial killer who terrorised 1970s Port Talbot?
Cast:Sion Alun Davies , Steffan Rhodri , Aneurin Barnard , Richard Harrington , Philip Glenister , Keith Allen , Nia Roberts , Scott Arthur , Karen Paullada , Steve Nicolson , Kriss Dosanjh , Gareth John Bale , Natasha Vasandani , Priyanga Burford , Elinor Crawley , Oliver Ryan , Jade Croot , Dyfan Dwyfor
As the CID reopen an investigation into three murders from 1973, DCI Paul Bethell tries to piece together a past that has haunted both him and a community for almost 30 years.
With the swabbing operation set in motion, Paul looks to not only find the killer but eliminate individuals whose past has been defined by false accusations and callous rumours.
Through groundbreaking, familial DNA technology, the team in 2002 manage to locate the killer. However, without 100 per cent certainty, Paul may have to rethink his approach.
As Paul searches for higher approval to proceed with Kappen's exhumation, the team are concerned that his tunnel vision could leave them in a worse situation than they once were.