Not really huge spoilers, but no point to reading this if you haven't seen "The First Blow" (S03E03).

The new and mostly irrelevant passenger addresses the train that they survived in a place of "trees, green grass, and life" that she called New Eden. We know this is a lie and this is five seconds after dude addressed the train that every place they have searched has "let them down". They are not making any sense now.
This new lady is also cracked and lost. Skeptics should see through her lie really quick. What are they going to do - lock her up? I guess the show could just make her vanish like they have with at least two regulars without explanation. With season 3, things are starting to get too sloppy. They look desperate to invent some recurring theme that was totally unnecessary but should have at least executed it with some sense.