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Episode #1.1 

In 1983, in a village outside Leicester, Lynda Mann is found raped and strangled to death. A year on, after an exhaustive but fruitless search for the killer, DCS David Baker is forced to scale down the investigation.


James Strong


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Episode cast overview, first billed only:
Jessica Hargreaves Jessica Hargreaves ... Lynda Mann
John Simm ... Alec Jeffreys
Anna Madeley ... Sue Jeffreys
Lucy Carless ... Susan Mann
Ged Simmons Ged Simmons ... Eddie Eastwood
Hannah Walters Hannah Walters ... Kath Eastwood
Lily Armitage Lily Armitage ... Sarah Jeffreys
David Threlfall ... DCS David Baker
Jaz Deol ... DC Taran Kholi
Lorcan Cranitch ... DI Alan Madden
Andrew Tiernan ... DS Geoff Taylor
Lydia Rose Bewley ... Vicky Wilson
Tobias Burton-Rudge Tobias Burton-Rudge ... Gavin Hopkirk
Jessica Woods Jessica Woods ... Carole Pitchfork
Darren Bancroft ... Mr. Hopkirk


In 1983 Dr Alec Jeffreys, a lecturer at Leicester University, enthuses to his students and less than impressed wife Sue, on the wonders of DNA. At the same time Chief Superintendent David Baker investigates the murder of school-girl Lynda Mann, setting up his base in the area where she was killed, but failing to make any progress, so that DCC Chapman orders him to concentrate on other crimes. Two years later a newspaper article highlights Jeffreys' discovery that every individual has their own unique DNA and he is called upon to help in a deportation case , which, due to his efforts, is successful. But in 1986, with Lynda Mann's murder a cold case, another young girl, Dawn Ashworth, is killed in the same way and in the same locality. Teen-ager Gavin Hopkirk is the prime suspect and admits to killing Dawn but not Lynda. Hearing of Jeffreys' success Baker seeks him out to prove that Hopkirk killed both girls but Jeffreys' findings reveal that Hopkins did not murder either of them. Written by don @ minifie-1

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Release Date:

6 April 2015 (UK) See more »

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Did You Know?


When the police go to arrest Gavin he is in a short-sleeved dark patterned shirt, but when he comes out of the front door a few seconds later he is in a cream long-sleeved top. See more »

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User Reviews

Quality from start to finish.
6 April 2019 | by Sleepin_DragonSee all my reviews

This is a truly excellent first episode. The fact that it's a true story perhaps had a bearing on the production, the storytelling is very realistic, gritty, and lacking the usual sensationalism normally present in modern day crime drama.

Some could argue the pace is a little slow, but it's deliberate, allowing the real story to be told, the importance and game changer, DNA.

Very good indeed. 9/10

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