One of my favorite episodes for most of what has already been listed. This is one of the first encounters with Vulcans that Archer starts to see them on an individual basis. With his past dealings he's really lumped them together as being a race that they cannot trust completely. It's over the course of the first two seasons that we see the crew overcome a lot of preconceived notions..
A lot of the series really centers around developing relationships, expanding our horizons and tearing down preconceived notions of people, lots of eliminating prejudice.