John Simm Society Blog

Two male characters standing in front of a rocky wall, dressed in formal suits
John Simm & Richie Campbell return for Grace Series 6 with four more adaptations of Peter James novels – Left You Dead, Capture You Dead, Dead Man’s Game, and One Of Us Is Dead.​

Grace Series 6 starts 29 March 2026 on ITV1 and ITVX

Code of a Killer: World’s 1st DNA Manhunt on DVD

Spirit Entertainment Limited
Release Date: 20 April 2015

From the Director of Broadchurch and the Producers of Line of Duty, comes Code of a Killer and the extraordinary true story of the world’s first DNA manhunt.

The gritty 2-part drama tells of Alec Jeffreys’ discovery of DNA fingerprinting and its first use by Detective Chief Superintendent David Baker in catching a double murderer.

Code of a Killer starring David Threlfall and John Simm on DVD
Code of a Killer starring David Threlfall and John Simm on DVD

David Threlfall (Shameless) takes the role of David Baker who between 1983 and 1987 headed up the investigation into the brutal murders of two Leicestershire schoolgirls, Lynda Mann and Dawn Ashworth.

Only a few miles away, Dr Alec Jeffreys, played by John Simm (Prey), was a scientist at Leicester University who, on 10 September 1984, invented a remarkable technique to read each individual’s unique DNA fingerprint.

ITV Trailer – Code of a Killer – 2 Part Drama

Code of a Killer from ITV Press Centre on Vimeo.

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