I have completed watching the first 18(out of 22) episodes of ALIAS season 1, and I did this in just two days(today and yesterday). It's amazing on how much I forgot about the first season. I already have the first two seasons on DVD and I hope to get season 3(its planned release date is the day before my birthday) for my birthday.
It appears that season 4 won't begin till the beginning of next year. :-(