It can get a little close sometimes-- Wearing two sets of clothing all day! I wonder how The Batman manages to deal with it? And people think being a super-hero is so easy! Thank the stars I don't have to live like one 24 hours a day! It's comforting to know that I can escape from all the pressures now and then-- Simply by slipping on a dark blue suit and a pair of horn-rimmed glasses! I doubt I could survive without my trusty alter ego! 
- — Superman
Superman #339 is an issue of the series Superman (Volume 1) with a cover date of September, 1979.
Synopsis for "Nuclear Nightmare!"
A mishap at a nuclear reactor transfers the mind of a scientist into the body of a robot, who confronts Superman and changes him into a being of steel.
Appearing in "Nuclear Nightmare!"
Featured Characters:
Supporting Characters:
Antagonists:
- N.R.G.-X (Grant Haskill) (Grant's Mind) (First appearance)
- Ray Ryker (First appearance)
Other Characters:
- United States Army
- Hank (Single appearance)
- Stacy Macklin (Cameo)
- Batman (Mentioned only)
- Seymour Goldstein (Mentioned only)
- Murray (Mentioned only) (Mrs. Goldstein's nephew)
- Grant Haskill (Human Form)
- Laurel Kenyon (First appearance)
- Sidney (Single appearance) (a GBS advertiser)
- C.U.R.E. (Committee for the Unconditional Regulation of Energy) (protesters)
- Jules Verne (Mentioned only)
- Sidney (First appearance) (WGBS Cameraman)
Locations:
- Texas
- Houston
- Testing Grounds (Unnamed)
- Houston
- Metropolis
- 344 Clinton Street
- Clark Kent's Apartment
- Hercules Health Spa
- Galaxy Communications Building
- Morgan Edge's Office
- 344 Clinton Street
- Shady Point Nuclear Generating Station (25 miles north of Metropolis)
- Research Laboratory (Destroyed)
- China (Mentioned only)
Items:
- Nobel Prize (Mentioned only)
- Star Wars (Mentioned only)
- Exo-Skeleton
- N.G.R.-X Suit (First appearance)
- Bomb
Vehicles:
- RSX378 Experimental Test Rocket
- WGBS Mobile Newsroom
Notes
- N.R.G.-X stands for Nuclear Radiation Generator-Experimental.
See Also