Perpetual pest of protagonists, Doctor Arthur Light, abandoned his solo pursuits at defeating the combined Justice League of America and individual members, to recruit a team of super-villains. Aiming his sights lower, defeating the New Teen Titans, he felt he had the right mixture to accomplish this and more. Recruiting the dwarf Gizmo (aka Mikron O'Jeneus), a genius developing multiple weapons; the brother and sister team of super-strong Mammoth and the matter-transmute maiden of Shimmer; (aka Baran and Selinda Flinders) and the mental mastermind Psimon (aka Dr. Simon Jones), the Fearsome Five were born. When this team betrayed Light and recruited eastern femme fatale Jinx and former Superman foe Neutron, and still met bitter defeat, this time by both the Titans and the Outsiders). Finally, Psimon was killed by Brainiac and the Doctor retired as did his teammates.
Doctor Light counterpart was around during this time, as well. Doctor Light of Earth-Two was a perpetual pest of Justice Society member Doctor Mid-Nite. Neither had any more success then Arthur had a universe away and several decades removed.