Challengers of the Unknown — DC Comics
Issue: #6
Last valuation update: 2026-09-09
After receiving reports of a super-powered criminal who has gained mystical flame powers, the Challengers are called by June Robbins to an archaeological expedition. She and Professor Brandon are seeking the mysterious Star-Stone, a powerful stone that would grant temporary powers. When it becomes known that someone is finding each of the four stones, and using them for ill-gotten gain, the Challe...
First appearances: Quadro, Charles Agar, Tartan The Ringmaster
Creators: Jack Kirby, Marvin Stein
Characters: Ace Morgan, June Robbins, Prof Haley, Red Ryan, Rocky Davis, Quadro, Charles Agar, Tartan The Ringmaster