| Issue | #12 |
| Published | May 1963 |
| Cover Price | 0.12 USD |
| Pages | 36 |
| Editing | Victor Gorelick |
| Characters | The Jaguar; Jill Ross; the Mind Monster |
| Genre | superhero |
| Pencils | John Rosenberger |
| Inks | John Rosenberger |
| Characters | The Jaguar; Jill Ross |
| Synopsis | Jill Ross discovers that her boss -- zoologist Ralph Hardy-- is really the Jaguar. |
| Script | Robert Bernstein |
| Pencils | John Rosenberger |
| Inks | John Rosenberger |
| Notes | Story continues in the next sequence. |
| Characters | the Jaguar [Ralph Hardy]; Jill Ross; the Mind Monster |
| Synopsis | Ralph uses a memory ray on Jill to make her forget about his secret identity. But that ray changes a common thief into a deformed human with massive psionic abilities after being exposed to it for hours. |
| Genre | superhero |
| Script | Robert Bernstein |
| Pencils | John Rosenberger |
| Inks | John Rosenberger |
| Genre | superhero |
| Letters | typeset |
| Characters | The Black Hood |
| Genre | superhero |
| Characters | the Jaguar |
| Synopsis | The Jaguar comes to thank a greeting card company for making gigantic cards of him for each holiday. But the cards are a trap set for the hero by an alien race. |
| Genre | superhero |
| Script | Robert Bernstein |
| Pencils | John Rosenberger |
| Inks | John Rosenberger |