| 0 | - | cover | 1 | pencils: Alex Schomburg; inks: Alex Schomburg | Namor, Sub-Mariner |
| 1 | Marvel Comics' Free $25.00 Prize Contest | promo (ad from the publisher) | 1 | script: ? [as The Editor] (signed); letters: typeset | |
| 2 | New York Hit by Green Flame | comic story | 12 | script: Carl Burgos; pencils: Carl Burgos; inks: Carl Burgos; letters: Carl Burgos | Jim Hammond, Human Torch |
| 3 | Butch the Giant | comic story | 8 | script: Paul Gustavson, Ray Gill; pencils: Paul Gustavson; inks: Paul Gustavson; letters: Paul Gustavson | The Angel, Thomas Halloway |
| 4 | The Sub-Mariner Goes to War | comic story | 10 | script: Bill Everett; pencils: Bill Everett; inks: Bill Everett; letters: Bill Everett | Namor, Sub-Mariner |
| 5 | The Claim Jumpers | comic story | 8 | script: Al Anders; pencils: Al Anders; inks: Al Anders | The Masked Raider [Jim Gardley]; Zeb; Luke; Manuel; Ben; Buck and his gang (villains, some die) |
| 6 | Warning Enough | text story | 1.75 | script: David Cooke; pencils: Harry Ramsey; inks: Harry Ramsey | Steve; Naylor; Jim Stinson; "Slip" Rodney (villain) |
| 7 | Statement of ownership, management, circulation, etc. | statement of ownership | 0.25 | script: Abraham Goodman, Maurice Coyne; editing: Abraham Goodman, Martin Goodman | |
| 8 | - | comic story | 8 | script: Steve Dahlman; pencils: Steve Dahlman; inks: Steve Dahlman | Electro (introduction, origin, a robot); Prof. Philo Zog (Electro's creator); the twelve Secret Operatives (introduction); Dick Gardner (secret operative #3); Little Joyce Lovely; Hymie "The Weasel" Pazetto (villain, introduction) |
| 9 | Quest for a Crime Boss | comic story | 6 | script: Bob Davis; pencils: Irwin Hasen; inks: Irwin Hasen | Ferret (introduction); Lynn Froehm; Doc Wagner (villain, introduction); Knuckles Johnson (villain, death) |
| 10 | Fourth Episode [Return of the Oman] | comic story | 10 | script: Ben Thompson; pencils: Ben Thompson; inks: Ben Thompson | Ka-Zar [David Rand]; Zar (a lion); Sha (lion mate of Zar); Chaka (ape leader); N'Jaga (a leopard); Trajah (an elephant); Paul De Kraft [aka Fat Face] (villain); Ed Kivlin (villain, introduction) |