[2] In 2006, newly promoted Detective Superintendent Steve Wilkins[3] decided to reopen two unsolved 1980s murder cases linked with a string of burglaries.

New advances in technology for forensic DNA analysis, witness reports and artists impressions of the suspect led to Dyfed-Powys Police reviewing a 1989 episode of Bullseye,[4] which led to the serial killer finally being caught.

The drama is the thirteenth in a series of ITV series featuring notorious British murder cases of the past two centuries, following on from This Is Personal: The Hunt for the Yorkshire Ripper (2000), Shipman (2002), A Is for Acid (2002), The Brides in the Bath (2003), See No Evil: The Moors Murders (2006), Appropriate Adult (2011), Dark Angel, In Plain Sight (both 2016), Little Boy Blue (2017), Manhunt (2019), White House Farm, and Des (both 2020).

[8][5] The series stars Luke Evans of The Great Train Robbery as Detective Superintendent Steve Wilkins, and Keith Allen as John Cooper, serial killer.

[16] Ed Cummings from The Independent criticised the programme for following dramatic clichés and poor script-writing, awarding two stars.