Continuity mistake: During season 4 when Ziva gets worried about Tony being 'sick', she is researching y. Pestis, and telling Gibbs how worried she is about Tony having tests and the long-term effects of plague. In season 5, first episode, when Ducky comes to tell the group that the body is not Tony because "he didn't have plague", Ziva looks confused and says "before my time?"
Continuity mistake: McGee, Gibbs and Ziva all agree it is Saturday morning. However when the director looks at her phone, it says it's Thursday. (00:06:40)
Continuity mistake: This episode takes place on the same day as the previous episode, however, Jenny's hair is now much longer. (00:02:35)
Chosen answer: It is never stated, however she must have been there several years if she is on presidential detail.