| Issue | #199 |
| Published | December 1954 |
| Cover Price | 0.10 |
| Pages | 36 |
| Editing | Whitney Ellsworth (credited), Jack Schiff (Managing Editor), Mort Weisinger, George Kashdan (story editors) |
| Genre | superhero |
| Pencils | Wayne Boring |
| Inks | Stan Kaye |
| Characters | Lex Luthor |
| Synopsis | Luthor creates a duplicate of Superman composed of duplicate atoms. Luthor then sends the duplicate to cause disasters and help criminals. Superman discovers the duplicate is not a robot and realizes that Luthor must be behind its creation. After battling the duplicate until its power runs out, Superman trails the energy source back to Luthor and destroys the machine responsible for the creation of the duplicate. |
| Genre | superhero |
| Pencils | Wayne Boring |
| Inks | Stan Kaye |
| Notes | synopsis by Darkmark |
| Genre | science fiction |
| Pencils | Jim Mooney |
| Inks | Jim Mooney |
| Genre | jungle |
| Script | Jack Miller |
| Pencils | Ed Smalle |
| Inks | Ed Smalle |
| Reprinted | in Tarzan (DC, 1972 series) #233 (October-November 1974) |