Personally, I think it’s even stranger that we would suddenly have a shapeshifter among the Visitors who’s out to get you of all people. If you haven’t been doing anything, why would a stranger from another world go so far as to wear your face in a dangerous situation like that? It’s not like we knew we would get rescued until the very end. Chances are, that person could have died while in a form that wasn’t even their own. That’s a pretty sad way to go, isn’t it?