Twin Peaks is now for sale on iTunes, in HD. I’m not quite sure what “HD” means in this context, since it aired long before HDTV existed. The important thing is that the proper US pilot is for sale. The version of the pilot on many VHS and DVD copies contains footage from later episodes, which is very confusing.
If you’ve never seen it, I can’t recommend the series enough. I like the whole series, but there’s no question it does down hill in season two. Watch the complete first season and the first nine episodes of season two (through “Arbitrary Law”).