

45 minSeason 5 • Episode 9
LatestHere we reveal how the notorious killer Mary Pearcey began an affair with her victim's husband, how she inserted herself into the family's life.
This drama-documentary series takes us back in time to the most shocking and surprising murder cases in London, England's history. Nicholas Day guides us into the world of the killer as we see how police ingenuity and early forensics helped bring them to justice.
Production
Gorgeous period recreations that cost probably £3 and a willing nephew.
Writing
Nicholas Day's narration: history professor meets gentle chaos.
Trivia, insights & behind the scenes
The show coincided with a British true crime renaissance, riding the coattails of 'Sherlock' mania while actually teaching real history.
Nicholas Day filmed many location segments in modern London, often standing feet from where the actual murders occurred—sometimes without permits, just a camera and nerve.