| 0 | - | cover | 1 | pencils: Steve Ditko, Jack Kirby; inks: Steve Ditko, Dick Ayers, Dick Ayers, Jack Kirby; colors: Stan Goldberg; letters: Sam Rosen | Thor; Human Torch [Johnny Storm]; Zemu |
| 1 | - | table of contents | 1 | script: Roy Thomas; pencils: Jack Kirby, Steve Ditko, Larry Lieber, Marie Severin; inks: Dick Ayers, George Roussos, Marie Severin; letters: Sam Rosen | |
| 2 | The Terrible Threat of the Living Brain! | comic story | 17 | script: Stan Lee; pencils: Steve Ditko; inks: Steve Ditko; colors: Stan Goldberg; letters: Art Simek | |
| 3 | Prisoner of the 5th Dimension! | comic story | 5 | script: Stan Lee, Larry Lieber; pencils: Jack Kirby; inks: Dick Ayers; colors: Stan Goldberg; letters: Art Simek | Human Torch [Johnny Storm]; George Bentley (real estate developer); Mr. Fantastic [Reed Richards] (cameo) |
| 4 | Part 2: Trapped in Another World! | comic story | 5 | script: Stan Lee, Larry Lieber; pencils: Jack Kirby; inks: Dick Ayers; letters: Art Simek | Human Torch [Johnny Storm]; Zemu (despot) (Intro); Valeria (Intro); Phineas (Intro); Theos (Intro) |
| 5 | Part 3: The End of Zemu! | comic story | 3 | script: Stan Lee, Larry Lieber; pencils: Jack Kirby; inks: Dick Ayers; letters: Art Simek | Zemu; Human Torch [Johnny Storm]; Valeria; Phineas; Theos; Mr. Harris (teacher) |
| 6 | Prisoner of the Reds! | comic story | 10 | script: Stan Lee, Larry Lieber; pencils: Jack Kirby; inks: Dick Ayers; colors: Stan Goldberg; letters: Art Simek | Thor; Jane Foster; Don Blake; Colonel Edward Harrison |
| 7 | Somewhere Waits a Wobbow! | comic story | 5 | script: Stan Lee, Larry Lieber; pencils: Larry Lieber; inks: G. Bell; colors: Stan Goldberg; letters: Art Simek | The Wasp [Janet Van Dyne]; Rack Morgan |
| 8 | The Day That Ant-Man Failed! | comic story | 11 | script: Stan Lee, Larry Lieber; pencils: Jack Kirby; inks: Sol Brodsky; colors: Stan Goldberg; letters: Art Simek | |