All this time people have been writing about how Tony is secretly brilliant and competent and Gibbs knows that and they have private dinners, despite the fact that on the screen Gibbs is mostly entirely dismissive of Tony, and then there it all was!

I mean, I don't think the writers particularly meant to imply that this has always been going on, it was just that the obvious choice in talking about Tony's dad is to contrast him to Gibbs, which requires an end of episode conversation between Tony and Gibbs, but oh, the implications are fantastic.

I also kind of love that Ziva is charmed by Tony's dad. Clearly she has a thing for the DiNozzo style. And that Abby, despite knowing Tony the longest, besides Gibbs, clearly knows nothing about his family. The way these characters pounce on any scrap of each other's back stories is always amusing. And it shows that, despite being their own work family, they don't actually know all that much about each other.