All characters in the puzzle are named humans. Thirty of them are played by actors who received main billing in at least one episode (the list can be found at http://lostpedia.wikia.com/wiki/Portal:Main_Characters). The six minor characters in the puzzle will be revealed by additional clues. Adjacent includes diagonal. The quiz requires knowledge of the show but can be completed without guessing. All characters can be entered by first name and for some also a commonly used nickname or surname.