The hunt to catch the killer of three young women in the Port Talbot area in 1973 and the remarkable story of how - in the first case of its kind - the mystery was solved almost 30 years later using pioneering DNA evidence. Contrasting the policing methods of the 1970s with the forensic breakthroughs of the early 2000s, the series portrays a town dealing with the repercussions of an unsolved case three decades on, and asks if justice can ever truly be found.
Scott Arthur
Sion Alun Davies
Keith Allen
Gareth John Bale
Aneurin Barnard
Kriss Dosanjh
Philip Glenister
Richard Corgan
Steffan Rhodri
Oliver Ryan
Steve Nicolson
Nia Roberts
Richard Harrington
Karen Paullada
Natasha Vasandani
Matthew Aubrey
Priyanga Burford
Richard Elfyn
Walter van Dyk
Calista Davies
Elinor Crawley
Jade Croot
Dyfan Dwyfor
Gruffudd Glyn
Amy Morgan
Rhys Rusbatch