| Issue | #31 |
| Published | November 1970 |
| Cover Price | 0.15 USD |
| Pages | 36 |
| Editing | Stan Lee |
| Genre | superhero |
| Pencils | Sal Buscema |
| Inks | Sal Buscema |
| Characters | Iron Man [Tony Stark]; The Mastermind [Bowers] (first appearance; villain; not the evil mutant); Smashers (first appearance; villain); Bullwhip Grogan (first appearance; villain); Kevin O'Brian (first appearance) |
| Genre | superhero |
| Script | Allyn Brodsky |
| Pencils | Don Heck |
| Inks | Chic Stone |
| Letters | Jean Izzo |