Though this one served the series arch to some degree, and presented a little character relationship development, the premise turned out to be an utterly undeveloped excuse for the whole episodes main plot. The ending was disappointing. I hope this is a fluke episode, and I'll assume so, as the series itself is in my top three right now... and I prefer it stay there. Let's clean up the writing just a little and not be so lazy.
Evo2Me is dead on the mark about everything as well.