Challengers of the Unknown

The Challengers of the Unknown were a group of adventurers that often explored unknown places, such as underground civilizations and other lost civilizations.

They often investigated paranormal activity, finding themselves in adventures battling aliens, ghosts, demons, monsters and other otherworldly menaces.

Membership

 * Ace Morgan


 * Professor Haley


 * Red Ryan


 * Rocky Davis


 * June Robbins

Earth-One
History unknown.

Scoobyverse
History not yet written.

Appearance
Super Friends books
 * Scooby-Doo Team-Up # 30 (2017)