This episode combines two noctorious murderers who were both known as the Angel of Death. Harold Shipman an English practitioner and American doctor Richard Angelo. If you weren't scared of staying overnight in the hospital now you will be.
Sources
Richard Angelo Sites
https://ivypanda.com/essays/richard-angelo-a-serial-killer-and-his-ethical-dilemma/
https://www.thoughtco.com/profile-of-serial-killer-richard-angelo-973130
https://en.wikipedia.org/wiki/Richard_Angelo
https://criminalminds.fandom.com/wiki/Richard_Angelo
Harold Shipman Sites
