SINGLE COMICS DC C Challengers of the Unknown Series 1 #31 PreviousChallengers of the Unknown Series 1 #30 NextChallengers of the Unknown Series 1 #32 Challengers of the Unknown Series 1 #31 Challengers of the Unknown Series 1 #31 £4.00 DC May 1963. 1st Print. Brown. FR/GD cover detached, staples rusted. 36 pages complete Add To Cart Facebook0 Twitter LinkedIn0 Reddit Tumblr Pinterest0