Episode 30: Donald Harvey.

In the annals of serial killers, few figures stand as disturbing and enigmatic as Donald Harvey, an American nurse's aide who preyed on the elderly and infirm in his care between 1970 and 1987. Known as the "Angel of Death" and the "Cincinnati Strangler," Harvey's reign of terror involved the murder of at least 87 people, though he confessed to over 180. His crimes, motivated by a deep-seated sadism and a fascination with human flesh, left a trail of devastation and shattered lives in their wake.