| 0 | The Mystery of Flash's Third Identity! | cover | 1 | pencils: Carmine Infantino; inks: Murphy Anderson; letters: Ira Schnapp | Flash [Barry Allen]; Top [Roscoe Dillon] |
| 2 | The Mystery of the Flash's Third Identity! | comic story | 12.33 | script: John Broome; pencils: Carmine Infantino; inks: Joe Giella; letters: Gaspar Saladino | Flash [Barry Allen; also as Missile Man]; Iris West; Jimmy Darrel (first appearance); Top [Roscoe Dillon] (villain); Paul Gambi (first appearance, villain) |
| 3 | - | promo (ad from the publisher) | 0.33 | pencils: Carmine Infantino, Murphy Anderson; inks: Murphy Anderson; letters: Ira Schnapp | |
| 4 | The Untold Stories of Superman! | promo (ad from the publisher) | 0.5 | pencils: Curt Swan; inks: George Klein; letters: Ira Schnapp | |
| 5 | Batman and Robin's Most Thrilling Mystery Cases! | promo (ad from the publisher) | 0.5 | letters: Ira Schnapp | |
| 6 | - | promo (ad from the publisher) | 1 | pencils: various; inks: various; letters: typeset | |
| 7 | Now -- Together -- in One Great Comics Magazine! | promo (ad from the publisher) | 0.33 | pencils: Howard Purcell; inks: Howard Purcell; letters: Ira Schnapp | |
| 8 | - | comic story | 1 | script: Julius Schwartz; letters: Milt Snapinn | |
| 9 | - | letters page | 1 | script: Julius Schwartz | |
| 10 | Slowdown in Time! | comic story | 11.67 | script: John Broome; pencils: Carmine Infantino; inks: Joe Giella; letters: Gaspar Saladino | Flash [Barry Allen]; Iris West; Professor T. H. West |
| 11 | Newest Hit in DC's Hall of Fame... | promo (ad from the publisher) | 0.33 | pencils: Bruno Premiani; inks: Bruno Premiani; letters: Ira Schnapp | |
| 12 | Your Free Trip Around the World! | public service announcement | 1 | script: Jack Schiff; pencils: Sheldon Moldoff; inks: Sheldon Moldoff; letters: Ira Schnapp | |