| Issue | #21 |
| Published | March 1960 |
| Cover Price | 0.10 USD |
| Pages | 36 |
| Editing | Pat Masulli (executive editor) |
| Genre | science fiction |
| Genre | science fiction |
| Genre | science fiction |
| Pencils | Charles Nicholas [as Cha-Nic] |
| Inks | Sal Trapani [as Sal-Tra] |
| Genre | science fiction |
| Letters | typeset |
| Genre | science fiction |
| Pencils | Charles Nicholas? |
| Genre | science fiction |
| Genre | science fiction |