Showcase #7

Low $135
Mid $400
High $2.5k
  • 2nd team appearance of the Challengers of the Unknown
  • 1st appearance of June Robbins, joined The Challengers
  • 1st appearance of Ultivac, a sentient robot
  • 2nd team appearance of the Challengers of the Unknown
  • 1st appearance of June Robbins, joined The Challengers
  • 1st appearance of Ultivac, a sentient robot

Issue Details

Publisher DC
Artist Jack Kirby
Writer Dave Wood
Published March 1957