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Challengers of the Unknown Vol. 1 (1958-1978) #1 The Human Pets! 
Challengers of the Unknown Vol. 1 (1958-1978) #2 The Monster Maker! 
Challengers of the Unknown Vol. 1 (1958-1978) #3 The Invincible Challenger! 
Challengers of the Unknown Vol. 1 (1958-1978) #4 The Wizard of Time! 
Challengers of the Unknown Vol. 1 (1958-1978) #5 Riddle of the Star-Stone! 
Challengers of the Unknown Vol. 1 (1958-1978) #6 The Sorcerers of Forbidden Valley! 
Challengers of the Unknown Vol. 1 (1958-1978) #7 The Isle of No Return! 
Challengers of the Unknown Vol. 1 (1958-1978) #8 Prisoners of Robot Planet! 
Challengers of the Unknown Vol. 1 (1958-1978) #9 The Plot to Destroy Earth! 
Challengers of the Unknown Vol. 1 (1958-1978) #10 The Four Faces of Doom! 
Challengers of the Unknown Vol. 1 (1958-1978) #11 The Creatures from the Forbidden World!
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