| 1 | Captain Atom (DC) | 1st Appearance of Wade Eiling; 1st Appearance of Dr. Megala; 1st Appearance of Babylon; Origin of Captain Atom |
| 1/NS | Captain Atom (DC) | 1st Appearance of Babylon; 1st Appearance of Dr. Megala; 1st Appearance of Wade Eiling; Origin of Captain Atom |
| 1 | Captain Atom (DC, Canadian Edition) | 1st Appearance of Wade Eiling; 1st Appearance of Dr. Megala; 1st Appearance of Babylon; Origin of Captain Atom |