Based on the extraordinary true story of Alec Jeffreys' discovery of DNA fingerprinting and its first use by Detective Chief Superintendent David Baker in catching a double murderer.
David Threlfall
DCS David Baker
2 episodes
John Simm
Alec Jeffreys
Anna Madeley
Sue Jeffreys
Andrew Tiernan
DS Geoff Taylor
Lorcan Cranitch
DI Alan Madden
Dorothy Atkinson
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It
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