Gibbs' rule no. 27: There are 2 ways to follow - 1st way they never notice you, 2nd way they only notice you.
When the team has the 3rd bad guy in the evidence garage looking at his car, a '71 Hemi 'Cuda convertible, Fornell states that there were 18 built. Most sources claim only 11 of these cars were ever produced by Chrysler. 3 of the 11 were 4 speed manual making them very rare.
The two tractor trucks in this episode are Freightliner FLBs; Damon and Ziva "drive" one without nameplates (with nameplates removed from the grille and the skirts).
McGee comments on the new locks on Gibbs door. In the previous episode Gibbs told Lawyer Margaret Hart that he would be locking his doors after finding her in his house.