From this episode, I realised how much some of the characters have grown since they were introduced to the show years ago.
I think McGee have grown the most. From a probie with no self-confidence and stammers when speaking to GIbbs or Dinoozzo, to a sometimes Senior field agent who demonstrates qualities of an exemplary ncis agent. The obvious change in him can be seen in his scenes with Dorneget.
Also, I think Ziva has changed after becoming a ncis agent. Not only able to do what she does best, she now is more open and outspoken.
Next, I think they ought to tell more about director vance's family.