Challengers of the Unknown #7 was published by DC Comics on September 1, 1991, as part of a series that began in 1991. Jeph Loeb and Katie Main write, and art comes from Art Adams, Lovern Kindzierski and Tim Sale. This 36-page issue features Rocky Davis, Ace Morgan, Red Ryan, Prof Haley and June Robbins, among 6 characters cataloged on VerseDB.