I'm going to agree with another answer and say the second season. Except for the last 15 seconds of the final episode Twilight. Very sad and unexpected if you haven't seen it before.
I'm obsessed with all of them!
But personally I love season 7 and 10
I like them all, but I say the 2nd season is the best.
All of them.
What's your favourite NCIS season?
