Dr. James Bradley works at Mercy Hospital treating victims of crime day in and day out. He decides to become a crime fighter and disguises himself with a surgical mask and trenchcoat. He is not afraid to use the tools of his trade on criminals and often uses a needle full of truth serum to get to the bottom of a mystery.

He worked together with his fiancee Mary Strong, a nurse who had no idea about his crime fighting secret.

His enemies included Max McNulty and Al Mirch, Blackie, Dr. Eeik, the Surgeon, the Swami, Dr. Ogden, and X2.

*Lightning Comics vol. 1 #6
**vol.2 #1-6
***vol. 3 #1
*Super-Mystery Comics vol. 3 #3-4, 6
**vol. 4 #1

*[http://marvel.wikia.com/wiki/James_Bradley_%28Earth-616%29 Marvel Database]
*[http://www.dpccomics.pwp.blueyonder.co.uk/theamericancomicshop/goldenagedatabase/index.php?search=Ace&searchpublishers=on Golden Age Heroes Directory]
*[http://www.internationalhero.co.uk/d/drnemesi.htm International Hero]
*[http://en.wikipedia.org/wiki/Doctor_Nemesis Wikipedia]
*[https://x-men.fandom.com/wiki/Doctor_Nemesis X-Men Wikia]

Category:Ace Characters
Category:1941 Debuts
Category:Unknown Creator
Category:Marvel Characters
Category:Heroes
Category:Comic Book Characters
Category:X-Men Characters
Category:Bradley Family Characters
Category:Battle-Axis Characters
Category:Medical Characters
Category:Male Characters
Category:Non-Powered Characters
Category:Protagonists
Category:Gwandanaland Characters