Soundtrack Question

I was wondering if the soundtracks to the first season specifically had the instrumental music in the episodes, like for example in episode 21. This is a very vague question, and I doubt it will get a reply, but I didn't want to spend thirty dollars on a CD if I wasn't sure what was on it.

I suppose what I mean to ask is: is there a list somewhere with a clear list of the song titles from specific episodes so I could then find the right soundtrack? I already checked wikipedia.