Neil Berriman’s life took a dramatic turn when he discovered that his birth mother, Sandra Rivett, was the nanny murdered in the infamous Lord Lucan case in 1974. Rivett’s body was found in Lucan’s home, sparking a long manhunt for the aristocrat, who vanished the same night. Now, as Berriman seeks to uncover the truth behind his mother’s murder, a new BBC series chronicles his journey and the ongoing investigation, which remains open. Despite a High Court ruling declaring Lucan legally dead, Berriman believes the fugitive is still alive, determined to pursue justice for his mother.