Dates
- Cover date
- June-July 1959
- On sale
- April 14, 1959
- Pages
- 36
Editions and covers
- Original editionSource ↗
Creators
pencils: Jack Kirby, Bob Brown, Bernard Baily, Henry Boltinoff, Irwin Haseninks: Wally Wood, Bob Brown, Bernard Baily, Henry Boltinoff, Irwin Hasenletters: Ira Schnapp, Henry Boltinoff, Irwin Hasenscript: Jack Kirby, Dave Wood, Jack Schiff, Henry Boltinoff, Irwin Hasen
Stories
- The Man Who Stole the Future · 11.67 pages
June's friend Marie comes to meet the Challengers to ask them to investigate weird events in her home country of Mordania. There they meet and fight the evil Drabny, whose scientific inventions have enabled him to take over Mordania.
- The Prisoners of Robot Planet · 12.67 pages
- Slim & Curly · 0.67 pages
- Sorcerer of the Swamps · 1 pages
Reprinted in
Challengers of the Unknown Archives (2003), Showcase Presents Challengers of the Unknown (2006), Challengers of the Unknown by Jack Kirby (2012), Challengers of the Unknown by Jack Kirby (2017), The Hundred Comic Monthly (1956), All Favourites, The 100-Page Comic (1957), Super DC Giant (1970)