| 0 | Am I Man or Machine? | cover | 1 | pencils: Al Feldstein; inks: Al Feldstein; letters: Jim Wroten | Roger Harvey's brain; Dr. Carl Walker; Professor Hugo Nelson |
| 1 | Vault of Horror | promo (ad from the publisher) | 1 | pencils: Johnny Craig; inks: Johnny Craig; colors: Johnny Craig; letters: Jim Wroten | |
| 2 | Am I Man or Machine? | comic story | 8 | script: Bill Gaines, Al Feldstein; pencils: Al Feldstein; inks: Al Feldstein; letters: Jim Wroten | Roger Harvey (a robot with Harvey's brain, Diane's former love interest); Diane [aka "Butterfly"]; Professor Hugo Nelson (in flashback); Dr. Carl Walker (Nelson's assistant, in flashback); Bob (Diane's husband, mention only); Kenneth (young boy, in flashback) |
| 3 | Only Time Will Tell | comic story | 7 | script: Bill Gaines, Al Feldstein; pencils: Harry Harrison; inks: Wally Wood; letters: Jim Wroten | Steve Dorner (scientist/inventor); Dan (Steve's assistant); scientist from the future [Steve Dorner] |
| 4 | Year of the Flood! | text story | 1 | pencils: ? (spot illustration); inks: ? (spot illustration); letters: typeset | Emergency Water Committee; jet plane pilots |
| 5 | The Men of Tomorrow | comic story | 6 | script: Al Feldstein; pencils: Jack Kamen; inks: Jack Kamen; letters: Jim Wroten | Captain Holly (death); Phelps (death); Professor Marvin Strand (death); inhabitants of the silent city (all die) |
| 6 | Picture Stories From... | promo (ad from the publisher) | 1 | pencils: Allen Simon, Don Cameron; inks: Allen Simon, Don Cameron | |
| 7 | Invasion! | text story | 1 | pencils: Al Feldstein; inks: Al Feldstein | Edward J. Stanhope (reporter); Benson Tate (scientist, death); Marvin Corliss (scientist, death) |
| 8 | ...Trip into the Unknown | comic story | 7 | script: Bill Gaines, Al Feldstein; pencils: Harvey Kurtzman; inks: Harvey Kurtzman; colors: Harvey Kurtzman; letters: Jim Wroten | scientific expedition [Professor Oppenheim; rest unnamed]; Eric; giant people (many die) |