| 0 | - | cover | 1 | pencils: Steve Dillon; inks: Steve Dillon | Atom [Ray Palmer] |
| 1 | Battle of the Tiny Titans! | cover reprint (on interior page) | 1 | pencils: Gil Kane; inks: Murphy Anderson; letters: Ira Schnapp | Atom [Ray Palmer]; Kulan Dar |
| 2 | Birth of the Atom! | comic story | 9.67 | script: Gardner Fox; pencils: Gil Kane; inks: Murphy Anderson; letters: Gaspar Saladino | The Atom [Ray Palmer] (scientist, introduction, origin); Jean Loring (attorney, introduction); un-named students |
| 3 | - | cover reprint (on interior page) | 1 | pencils: Mike Carlin, Keith Wilson; inks: Keith Wilson | Atom [Ray Palmer]; Martian Manhunter; Batman; Mr. America; Red Tornado [Ma Hunkel] |
| 4 | The Secret Origin of the Atom | comic story | 19 | script: Roger Stern; pencils: Dwayne Turner; inks: Keith Wilson; colors: Nansi Hoolahan; letters: Todd Klein | Atom [Ray Palmer]; Laethwen; Eddie Thayer; Ted Ralston; Voss; Jean Loring; Chronos (cameo); Justice League of America [Hawkman; Aquaman; Batman; Green Lantern [Hal Jordan]; Flash [Barry Allen]; Martian Manhunter] (cameo) |
| 5 | - | cover reprint (on interior page) | 1 | pencils: Steve Dillon; inks: Steve Dillon | Atom [Ray Palmer] |
| 6 | Shrinking from the Past | comic story | 54 | script: Tom Peyer; pencils: Steve Dillon; inks: Steve Dillon; colors: Gene D'Angelo; letters: Ken Bruzenak | Chronos; Atom [Ray Palmer] |
| 7 | - | cover reprint (on interior page) | 1 | pencils: Gary Frank; inks: Gary Frank; colors: Nathan Eyring | The Atom [Ray Palmer]; Hawkman [Carter Hall]; The Colony |
| 8 | Nucleus, Conclusion | comic story | 46 | script: Jeff Lemire; pencils: Mahmud Asrar, Allan Goldman, Robson Rocha; inks: John Dell, Andy Owens, Eber Ferreira, JP Mayer; colors: Pete Pantazis; letters: Sal Cipriano | The Atom [Ray Palmer]; Hawkman [Carter Hall]; Oracle; Dr. Mid-Nite [Pieter Cross]; Asimov; David Palmer; Jack Palmer; Alphaeus Hyatt; The Colony |
| 9 | - | cover reprint (on interior page) | 1 | pencils: Ivan Reis; inks: Joe Prado; colors: Marcelo Maiolo | The Atom [Ryan Choi] |
| 10 | JLA Rebirth: The Atom | comic story | 20 | script: Steve Orlando; pencils: Andy MacDonald; inks: Andy MacDonald; colors: John Rauch; letters: Clayton Cowles | Ryan Choi; The Atom [Ray Palmer]; Adam Cray; Ta-You Choi; Ah-Lien Choi; Dean Plumm |
| 11 | The Atom | character profile | 1 | script: Len Wein, Marv Wolfman; pencils: Gil Kane; inks: Gil Kane | Atom [Ray Palmer]; Jean Loring (background) |
| 12 | The Origin of the Atom | comic story | 2 | script: Len Wein; pencils: Mark Bagley; inks: John Dell; colors: Pete Pantazis; letters: Sal Cipriano | Atom [Ray Palmer] (origin); Jean Loring; Chronos [David Clinton] (villain) |