 J. Allen Carter, one of the astronauts on Mars from the premier  episode "Secret Origins" is named after John Carter, Warlord of Mars  from several classic science fiction novels by  Edgar Rice Burroughs (qv). It could also be viewed as homage to  the names Jay Garrick, Alan Scott, & Carter Hall (the "Golden Age"  versions of the Flash, Green Lantern & Hawkman, respectively).