Turns out these London-Glasgow plotters weren't the first crazy doctors

Check out this list of famous physicians provided by Wikipedia:

John Bodkin Adams - British suspected serial killer.
Karl Brandt (1904-1948) - Nazi human experimentation
Baruch Goldstein - assassin
Radovan Karadžić (b. 1945) - accused of ethnic cleansing in Yugoslavia
Josef Mengele (1911-1979) - known as the Angel of Death, Nazi human experimentation
Herta Oberheuser (1911-1978) - Nazi human experimentation
Shiro Ishii - headed Japan's Unit 731 during World War II which conducted human experimentation for weapons and medical research
Harold Shipman (1946-2004)- British mass murderer
Ernesto Che Guevara - ...cold-blooded murderer, sadistic torturer, and a terrorist...