Challengers of the Unknown (1958-1968) Writer Jack Kirby Artist Jack Kirby Genres Exploration Sci-Fi Themes Dimension-Hopping Lost Civilizations Quest/Expedition Time Travel Whodunnit/Procedural The Man Who Tampered With Infinity Challengers of the Unknown Volume 1 #1 Challengers of the Unknown Volume 1 #2 The Wizard of Time Challengers of the Unknown Volume 1 #3 Challengers of the Unknown Volume 1 #4 Captives of the Space Circus Challengers of the Unknown Volume 1 #5 Challengers of the Unknown Volume 1 #6 The Beasts From Planet 9 Challengers of the Unknown Volume 1 #7 Challengers of the Unknown Volume 1 #8 The Secret of the Sorcerer's Box Challengers of the Unknown Volume 1 #64