"People will see the finale and say, "I know what's going to happen next in the first episode back." Wrong. You don't know what's going to happen. People will go, "Am I really seeing that? What just happened?" It really is exciting. I promised that with (the Season 5 finale) "Judgment Day," and I think we delivered. It is very much in that vein."
I think it is safe to assume that Cote won't be back on Gibbs team. Even if NCIS rescues her, I doubt that she will return to Gibbs team based on Shane's spoiler.