Mark "Prof" Haley

Mark 'Prof' Haley is a member of the Challengers of the Unknown, DC's team of daring adventurers who cheat death and explore the bizarre and unexplained alongside teammates Ace Morgan, Rocky Davis, and Red Ryan.

A Silver Age stalwart of DC's daring adventurer set, Mark "Prof" Haley made his debut in Challengers of the Unknown #53 in 1966, brought to life by Ed Herron and Bob Brown. Across nearly two decades of publication, he shares the page with the likes of Kyle "Ace" Morgan, Leslie "Rocky" Davis, and Matthew "Red" Ryan — bold company that places him squarely in the thick of DC's most thrilling exploratory corners. His appearances in DC Comics Presents even put him in the same issues as Superman and Clark Kent, a testament to the reach of his adventures. A niche gem for dedicated Silver Age collectors, Prof Haley is the kind of character who rewards the fan willing to dig a little deeper into DC's rich back catalog.