SINGLE COMICS DC C Challengers of the Unknown Series 1 #63 PreviousChallengers of the Unknown Series 1 #62 NextChallengers of the Unknown Series 1 #64 Challengers of the Unknown Series 1 #63 Challengers of the Unknown Series 1 #63 £5.00 DC Sep 1968. 1st Print. Drake, Brown, Abel. VG 4.0. 36 pages complete Add To Cart Facebook0 Twitter