Ghost of Dark Mountain
Well judging from the things that there are observers, surely they would've realize the 'family', right? and from what happened to the train, we can only say that this family might exist but they're 'invisible' or powerful enough to escape observation, or its just his imagination of his 'powers' and 'craziness', and what seems like him being 'normal' is what perhaps make him special because in a world full of crazies, he can look and act normal, BUT, presuming the world is indeed crazy like we're told, which seems unlikely so far because other characters appears normal somewhat.