This eight-issue mini-series features Jeph Loeb's debut in the comic book industry, having previously been a screenwriter for movies like Commando and Burglar, as well as Tim Sale's first work for DC Comics. Each issue highlights a different cover artist.

While many superheroes are perpetually young, the Challengers of the Unknown have aged into their forties, living off of the fame and renown of having saved the world from peril several times over decades earlier. However, when tragedy strikes, apparently claiming the lives of two of the Challengers and threatening their resources and freedom, will the surviving members of the team go their own separate ways or come together to solve the mysteries surrounding the tragedy?

Collected Editions

• Challengers of the Unknown by Jeph Loeb and Tim Sale
• Challengers of the Unknown Must Die