General Practitioner Harold Shipman was convicted of killing 15 patients in 2000. An official report after his sentencing took that figure to 215. He was sentenced to life in prison and committed suicide in his cell 2004. This exclusive documentary lifts the lid on the shocking discoveries made by his colleagues in early 1998; how police were alerted but the killer was left to murder three more women before finally being arrested in September 1998. (thetvdb.com)