Issue: #2
The Challengers of the Unknown venture on their first mission for the Professor…to the bottom of the ocean! But when the ancient artifact they have to collect turns out to be far more dangerous than expected, the new teammates realize they might not all make it out alive!
Creators: Andy Kubert, Brad Anderson, Scott Snyder, Brian Cunningham, Deron Bennett, Klaus Janson, Aaron Gillespie, Andrea Shea
Characters: Ace Morgan, Aquaman, Prof Haley, Red Ryan, Rocky Davis, Moses Barber, Trina Alvarez, Bethany Hopkins, Krunch