After years of family drama from Gibbs, Tony, Ziva, and even Abby, I finally got to see a little more of Tim MGee's background. All I previously knew is that he had a sister! Now, we know that his maternal grandmother is the one he takes after, in the scientific smarts department. And, that he hasn't spoken to his father in seven years.
The sci-fi angle might have been a little anachronistic, re: the microchip-controlled catepillars. But, it wasn't totally un-realistic. After all, it's a little-known historical fact that Uncle Sam almost fire-bombed World War II Tokyo using trained bats! The only thing that prevented it was the deployment of something called "the A-bomb."
All in all? A nicely Mc-centric episode (as Tony might say).