Dates
- Cover date
- August-September 1959
- On sale
- June 16, 1959
- Pages
- 36
Editions and covers
- Original editionSource ↗
Creators
Stories
- The Men Who Lost Their Memories! · 9.67 pages
When a villain named Dekkar uses a machine to steal the Challengers' memories, June Robbins must show her amnesiac friends how to defeat their foe. Goading them, she makes them recall their mountain climbing, diving, and other skills. Feigning amnesia, the Challengers get into the villains' castle to fight. June inserts the memory disk into the machine, hits reverse, and restores the guys' memories.
- Untitled · 0.67 pages
Shorty creates "atomic gunpowder."
- The Plot to Destroy Earth! · 13.67 pages
The Challengers stumble upon an alien plot to dismantle the Earth. A mole-creature will slice the Earth apart. A sea monster will hold back the seas. A flying creature will trap the air, and pie-shaped slices of Earth will be stolen by a robotic ship! Ace jets to the ship and finds it's on autopilot, run by robots for a long-dead race. The Challengers attack the creatures without success, until they inflate huge balloons that simulate the creatures dying. The robots abort the mission as a failure and depart.
- The Menace of the Rainbow Rays · 1 pages
Characters
Reprinted in
Challengers of the Unknown (1960), Showcase Presents Challengers of the Unknown (2006), The Hundred Comic Monthly (1956)