First appeared in Lightning Comics #6 in 1941 and was originally published by Ace Periodicals before falling into the public domain. Dr. James "Jim" Bradley was a doctor at Mercy Hospital who used truth serum during his time as the crime fighter Doctor Nemesis. In the Marvel Universe, he is a mutant and a cyborg, has been a member of the Battle-Axis, X-Men, X-Force, and X-Club