Eclipso; Bruce Gordon; Mona Bennet; Professor Bennet
Synopsis:
Bruce Gordon develops an ultra-violet ray gun to try to make Eclipso into a force for good. A meteor crashes to the ground and a space-creature is released that gives Eclipso new powers.
Alan Kupperberg is the credited letterer of this story in Manhunter: The Special Edition (1999), where this story is reprinted. The Simonson lettering credit is per Archie Goodwin on page 97 of Detective Comics #443 (Oct.-Nov. 1974).