Fan Casting Professor Walter Mark "Prof" Haley in Return to the DC Universe

A brilliant oceanographer and skin diver, Professor Walter "Prof" Haley was on his way to a radio show with Ace Morgan, Leslie "Rocky" Davis and Matt "Red" Ryan, when their plane crashed. Surviving by a miracle, the four came together, becoming the Challengers of the Unknown, living on borrowed time and facing the mysterious out there. Due to his intelligence, Prof is the leader of the team, proving to be a skilled tactician and planner, as he also has helped with all the technology in the Challs' HQ, Challengers Mountain.