Category:Evil doctors

From Smallville Wiki

With the use of their power and money, Lionel and Lex Luthor have been able to employ dozens of members of the medical and educational community to further their various questionable research experiments and projects.

To be fair, not all of the doctors listed are "evil" per se- most of them were probably just doing what they had been paid to do. Some of the doctors even had a change of heart and attempted to back out of their assignments, but were almost always murdered for their refusal to cooperate. Some of these professionals were killed by their experiments, but very few of them have had to face any legal or judicial consequences of their machinations.