| Unofficial Challengers of the Unknown Index |
Credits:
| Story | Arnold Drake |
| Art | Bob Brown |
| Lettering | Stan Starkman |
| Editing | Murray Boltinoff |
Feature Character(s):
- Challengers of the Unknown
- Ace Morgan
- Rocky Davis
- Red Ryan (believed to have sacrificed his life)
- Prof Haley
Villain(s):
- Villo
- Brainex
- "Collapse-O" (first appearance; a robot built by Villo to appear as an invading alien ship)
- League of Challenger-Haters
- Multi-Man (last in Doom Patrol #102; next in flashback in issue #61/2)
- Multi-Woman (last in Doom Patrol #102; last appearance)
- Kra (last in Doom Patrol #102; next in flashback in issue #61/2)
- Volcano Man (last in Doom Patrol #102; next in flashback in issue #61/2)
Other Character(s):
- Tino Manarry (first appearance; a teenage rock star and mechanical genius who vows to destroy the Challengers)
Location(s):
- Challenger-Haters' Arctic hideout (first appearance)
- Challengers Sub-Sea Base
- New York City, NY
- United Nations Building