[ It's not that he's sad, here. It's just hard sometimes, coming to terms with the realization that he's so far away from his crew. He wouldn't want them to end up here if they didn't want to be here, but a selfish part of him is honestly happy that Uhura's shown up. ]

Hm... sometimes. Comes and goes. The Quarantine is a walled city surrounded by wildlife, so sometimes wild animals show up. For those of us who travel beyond the walls regularly, those sightings are a little more commonplace. I'm more used to it, for instance.