The worst part of this episode is that it is almost dull. There are many times I wasn't even paying attention due to the lack of a good story. It is your basic sci-fi romp, an alien is heading towards Earth, so Spock is needed to communicate with the being before it does something it will unknowingly do. The episode is alright, I suppose, but it is not that exciting. There are some parts that capture interest for a little while, but then it just seems to start dragging again. Overall, it's alright, but definitely not the best in the series.