The BEST seasons of Code of a Killer

Every season of Code of a Killer ever, ranked from best to worst by thousands of votes from fans of the show. The best seasons of Code of a Killer!

Code of a Killer is 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. The drama focuses on how Jeffreys’ science and Baker’s investigative vision created the single biggest leap in the history of criminal investigation.