Volume 1: Showcase (DC, 1956 series) #6-7, 11-12 and Challengers of the Unknown (DC, 1958 series) #1-17.
Volume 2: Challengers of the Unknown (DC, 1958 series) #18-37.
Issue # | Volume | Publication Date | Pages | Content Items |
#1 1/1 | 1 | December 2006 | 548 | 76 (53 stories, 1 cover) |
#2 | 2 | June 2008 | 532 | 66 (41 stories, 1 cover) |