It is hard to recall a series in the past that just seems to get better each season. Usually they hit a peak and sort of stagnate. NCIS does not have this problem. The cast, new and old, appear to work well together in season 6.
We really enjoy the subtle interweaving of the plot lines from episode to episode, even season to season. This gives NCIS casual viewers the ability to miss an episode without feeling like they lost the point of the season's story arc and gives the intent viewers the clues to see the foreshadowing of future story lines. Watching the episodes in this dvd format you see a lot of the storyline develop that you might have missed when they originally aired.
A cleverly done series. At times dark, at times funny, at times sad but always a good show.