Simple plot and quite predictable. Nothing too exciting happened. But, I enjoyed it nevertheless and that's what matters most. The Dr. Keller character is starting to grow on me the last few episodes, similar to how Carter grew on me on Sg1. Okay, she was whiny like Mckay was, but given what she normally does it could be understandable. By the way, Carter was once again completely absent - the distinction between star and recurring role is...well, whatever.
It was girls night out! Wouldn't it be great if you also added Carter to that adventure? There were a few funny moments, like the Boleki(?) hunting them quietly while sucking a lollipop! And they did leave a few mysteries for future episodes. Overall, good episode.