Superman [Clark Kent]; Jimmy Olsen; Perry White; El Gar Kur (villain)
Synopsis
A criminal from Kandor switches places with Jimmy Olsen and forces Superman to reveal the location of his Fortress of Solitude, so he can destroy the bottled city. But scientists in Kandor reverse the switch just in time.
letters submitted by Rick Tabor; Greg Gilmartin; Lawrence J. Joffee; Butch Yaffee; Emily Klerekoper; John Atlas; George H. Briggs III; James B. Branchman