Dinozzo would not have been able to carry a gun in France . Despite being a federal officer in NCIS , it would still be illegal.
When the Interpol team of marksmen targeted Lila, they all used red laser sights on their weapons. Marksmen and snipers never use them since they give away their positions to their targets.
Ducky tells DiNozzo to tip the French "not a centime more" (a subdivision of the franc), but the official currency of France has been the euro since 2002. However the subdivision of the Euro is the Cent and some Brits still call them centime.
When DiNozzo hands his pistol to Inspector Chablis, he hands it to her barrel
first. He should have ejected the magazine, ejected the live round in the chamber, and then, holding the pistol by the barrel, handed the pistol to Chablis butt first.
Ellie says that Tony's phone is still going straight to voicemail. Straight to voicemail means the voicemail picks up without the phone ringing, but Tony's phone is heard ringing twice before the voicemail picks up.