This one made you think, is Gibbs doubting himself. Is he over the hill, no, it all starts to click in his mind who the real spy is and the looks with Lisa Lapari show he knows what happened and I think so does she.
How they will bring her back into a compromising position and let Gibbs take her down is for another episode.
Just when you think you have seen it all we get an episode like this, not the running and shooting kind but one that you are always one step behind until the end.
Very well done, kept me interested all the way.