| Unofficial Challengers of the Unknown Index |
Credits:
| Story | Arnold Drake |
| Art | Bob Brown |
| Lettering | Stan Starkman |
| Editing | Murray Boltinoff |
Feature Character(s):
Villain(s):
- Ooze (Killer Starke; first appearance; a criminal transformed into a giant humanoid moving ooze that eats any matter and increases its size; pushed out of the Ooze)
Location(s):
- Central Africa
Credits:
| Story | Ed Herron |
| Art | Bob Brown |
| Lettering | Stan Starkman |
| Editing | Murray Boltinoff |
Feature Character(s):
Villain(s):
- Doctor Heller (first appearance; an Nazi scientist who hides on a Pacific Island)
- Japanese soldiers (first appearance for all; aid Heller)
Location(s):
- A remote Pacific Island