The series starring Emilia Fox and Professor David Wilson will return to shine a light on a new batch of unsolved murders.

Criminologist Dr Graham Hill will also be joining for the new run.

The news series will be distributed by Abacus Media Rights who have already sold series 1 to BritBox North America.

Ian Lamarra, Creative Director Alaska said: “It is always great for a smaller indie to get a returning brand. This commission is all the more exciting in that the first run achieved such a reaction that many cases in series 2 are based on viewer response. At a time when PSBs are being scrutinised, things like this underline their unique and important position.”

Will Rowson, Commissioning Editor at Channel 4 said: “Emilia and David are great talent and each bring their own following to the channel. The first series was stylish, purposeful and compassionate. I’m delighted to have recommissioned such a distinctive and successful title in a competitive space.”

Executive Producers are Paul Sommers, Ian Lamarra, Chris Fouracre, Emilia Fox and Professor David Wilson. Series producer is Melissa Mayne and commissioning Editor is Will Rowson.