When suspect Aaron Alan Wright and his lawyer are leaving NCIS, Wright lights a cigarette and blows the smoke out of the elevator into the building. The shot changes to a different angle and the cigarette is suddenly in his mouth again.
At the end of this story Gibbs speaks of a case involving the FBI in Sicily and mentioned that this was the first case to convict using DNA evidence. The first case to convict (and actually also find someone innocent) was actually in Narborough, England. Gibbs was maybe talking about the first US case, rather than the first worldwide case. (Read "The Blooding" by Joseph Wambaugh for the facts.)
Gibbs suggests that DNA profiling was first used in investigating the murder of Giovanni Falcone in Capaci in 1992. However, its first use was in 1984 after its discovery by Alec Jefferies of the University of Leicester in England, catching the double murderer Colin Pitchfork.
On the screen displaying the USPS records for Dion Lambert, it says "Reciept" rather than the correct "Receipt".
A subordinate cop brought Gibbs and Lt Cheney each a fresh coffee. They both put them to their mouths and tipped the cups horizontal. If they were hot fresh coffees, then they would have burnt their mouths as well as pouring coffee down their shirts.