A quiet civil servant. A hidden double life. This is the chilling true story of Dennis Nilsen, one of Britain’s most notorious serial killers. From his lonely past to the horrifying discovery that exposed his crimes, we uncover how he lured victims, lived among the dead, and evaded suspicion for years. A disturbing case that raises one haunting question—was he born this way, or created?

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This episode includes AI-generated content.