As a huge C.S.I. fan, I cannot objectively rate this. I love C.S.I., and own the other two seasons. I just spent the weekend watching this (Yes I know I need a life! : ), but I felt it was a weekend well spent.
Even though C.S.I. had two plotlines that never worked in season three (Grissom's hearing loss, and Sara lusting over Grissom), this season contains some of the best C.S.I.'s yet. When the personal lives of the C.S.I's combine with the cases they are working on, you get some of the best acting out of this distinguished group of actors. The plotline of Eddie Willows' death, and how it effects Catherine is probably one of the most gripping ones of the season. Also, when Warrick puts his personal feelings for the victim, someone's daughter from his past, ahead of his criminalistic objectivity we see how fragile he really is.
In most every C.S.I. episode, there is an "A" story and a "B" story. At times, you wish that the C.S.I. writers would use only one story at a time, as it could get confusing. But other then that, I cannot find any horrific flaws.
Jerry Bruckheimer continues his reign as the modern day Jack Webb with his series "Cold Case", and "Without a Trace". The C.S.I. Miami and now New York series are watering down the name, but Bruckheimer continues to turn out hit after hit. Go with this C.S.I. season for a great DVD set.