When Tony hesitated and then said tell me about it you sort of knew he was referring back to Ziva. Then, when you add to that his statement that it never stops him from trying, it may mean that the Ziva story is not over. Sure, nothing’s happening in the near future, but I think this is the writers letting us know that the door is still pretty much wide open.
'Once a Crook' review - TV Fanatic
The day she walks back through that door then is when I will start watching again.