. "Heroes (season 4)" . . "final season" . . . . . . "Heroes (season 4)#ep2" . . . . . . . "18" . . "season four" . . . . . "4" . "Season four" . "fourth season" . "2009-09-21" . "S 4" . . . . . "''Heroes'' (season 4)" . "season 4" . "Season 4" . . . "four" . . . "Heroes (season 4)" .