- Script
- Arnold Drake
- Pencils
- Bob Brown
- Inks
- Bob Brown
- Colors
- ?
- Letters
- Gaspar Saladino
- Genre
- adventure
- Characters
- Challengers of the Unknown [Rocky Davis; Red Ryan; Ace Morgan; Professor Haley]; Marty Ryan [Tino]; The Challenger Haters [Multi-Man; Kra; Volcano Man]; Mr. Morton
- Synopsis
- The team discovers that Red is not dead but has drank the liquid light formula and become a crazed criminal.
- Reprints
- Keywords
- Liquid light
Story across 24 pages, but pages 8, 16, and 24 are 1/2 pages. Script credit from Martin O'Hearn.
- Script
- Murray Boltinoff
- Letters
- typeset
On the page between page 8 and page 9 of the main story sequence.
Letters from: Alan Lipsett, Wallace L. Hopkins. Excerpts of letters from: John Zocco, Bill Urban, James Schneck, Charles Vice, Gary Martin, Joe Lenius, Sherry Betts, Brian Witt, Samuel Herskovitz, Larry Emery.
- Script
- Ed Herron
- Pencils
- Bob Brown
- Inks
- Bob Brown
- Colors
- ?
- Letters
- Stan Starkman
- Genre
- adventure
- Characters
- Challengers of the Unknown [Rocky Davis; Red Ryan; Ace Morgan; Prof Haley]; Cyclops (flashback)
- Synopsis
- Prof is trapped in his mini-sub and the team has two hours to rescue him before a bomb explodes.
- Reprints
Page count corrected by Bryan Stroud. Page 7 and page 8 of the original story combined into one, with the top tier of panels of page 7 removed entirely and the other panels trimmed down.