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4 Episodes 2021 - 2021
Episode 1
47 mins
In July 1992, 23-year-old Rachel Nickell was stabbed 49 times in front of her young son on Wimbledon Common. This fact-based drama revisits the investigation into her killing, which saw an undercover officer - known by the code name Lizzie James - used as bait to entrap the prime suspect, self-confessed lonely man Colin Stagg, who much later was proved to be innocent of the crime.

Episode 2
47 mins
Enters the world of Colin Stagg, the Met Police's prime suspect. In officers' minds, Stagg perfectly fitted the criminal profile of the killer, and yet there was no hard evidence linking him to the murder. Their hopes of a conviction rested on the involvement of undercover officer Sadie Byrne in his life.

Episode 3
47 mins
As the weeks pass, undercover police officer Sadie - aka Lizzie - is unable to crack prime suspect Colin Stagg, and it soon becomes clear that the pressure she's under is starting to have a profound impact.

Episode 4
47 mins
Colin Stagg is interrogated by police about Rachel's murder details and is subsequently put on trial.
