| Unofficial Challengers of the Unknown Index |
Credits:
| Story | Ed Herron |
| Art | Bob Brown |
| Lettering | Stan Starkman |
| Associate editing | Murray Boltinoff, George Kashdan |
| Editing | Jack Schiff |
Feature Character(s):
Villain(s):
- Multi-Man (Duncan Pramble; first appearance; swallows a "liquid light" formula to become immortal, acquiring a new super-power with each death)
Story Reprinted in:
- Brave and the Bold #113 (June-July 1974)
- Showcase Presents Challengers of the Unknown #1 (2006)
Credits:
| Story | Ed Herron |
| Art | Bob Brown |
| Lettering | Stan Starkman |
| Associate editing | Murray Boltinoff, George Kashdan |
| Editing | Jack Schiff |
Feature Character(s):
Supporting Character(s):
- June Robbins (next in issue #15/2)
Villain(s):
- Three K'zana (first appearance; three gigantic humanoid unintelligent creatures that accidentally summon the Challengers to an alien world)
Location(s):
- Challengers Mountain
- An unnamed alien world (first appearance)
Story Reprinted in:
- Showcase Presents Challengers of the Unknown #1 (2006)