Continuity mistake: The way Tony holds his phone in the scene at the start changes changes between shots instantly. (00:02:00)
Continuity mistake: When the remains drop onto the shrimp boat, the position of the boats differs between shots. (00:01:00)
Continuity mistake: The way Ziva holds the sailor's Dog Tags changes between shots. (00:21:25)
Continuity mistake: When running from the dogs, the shadows of the vehicles are constantly changing. Best example is the camper-van. In one shot the shadow is central and directly beneath the vehicle showing the sun is high above them. In another shot the shadows are elongated and to the side. (00:33:00)
Continuity mistake: When McGee is running from the dogs he runs past the camper-van. Camera changes and he's level with the rear of the camper-van again. (00:33:00)
Continuity mistake: The amount of splatter on the security camera changes when we see DiNozzo looking through his binoculars to when McGee shot at the camera. (00:30:00)
Continuity mistake: McGee rests his paintball gun to the screen left side of the metal post in the gate. Camera changes and now it's on the screen right side of the metal post. (00:29:30)
Continuity mistake: When Tony is looking through his binoculars, he is holding them with one hand then 2 hands instantly. (00:29:00)
Continuity mistake: When Abby and McGee copy each other with the "You're not listening to me" line, Abby has her hand lowered. Camera cuts and now her hand is raised and she is pointing. (00:11:40)
Continuity mistake: When DiNozzo runs from Metro, he jumps past a couple sat on the grass. We then see a shot of the metro officer, and back to DiNozzo who hasn't reached the couple yet. (00:10:40)
Continuity mistake: When talking to the Metro cop about her scarf, she has her left hand on the steering wheel. Camera changes and we don't see her arm move. Camera changes again and now her left hand is on her scarf. (00:04:50)
Continuity mistake: When the metro cop leans out of the victim's car, her scarf is wrapped around her arm. Camera changes and it no longer is. (00:04:40)
Audio problem: McGee says he has an idea but he needs to look at Arnet's car. When he does, his mouth doesn't move in the over the shoulder camera but he can still be heard. (00:28:30)
Continuity mistake: When talking to the Judge, Tony puts his hands on his coat collar. During this shot, the camera changes and his hands have instantly disappeared. (00:09:30)
Continuity mistake: The blog post that the NCIS team pulls up starts differently to the one that is typed out at the start of the episode. (00:00:15 - 00:07:00)
Continuity mistake: The cop removes her scarf from round her neck. Camera changes and she repeats the action. (00:04:30)
Continuity mistake: We finally see that it is McGee tied up on the floor. When he is rolled over to see his face, there is a cigarette butt on the floor by his head. When the camera next shows him the butt has gone. (00:21:50)
Continuity mistake: When Abby says that Ziva is uniformly absent, she has her hands out of shot. Camera changes and you can see her pointing at Tony and McGee which should have been visible in the previous shot. (00:24:20)
Continuity mistake: When Gibbs and Tony leave their respective rooms we see Gibbs close his door via the monitor in Tony's room. However when they emerge into the hallways Gibbs shuts his door again. (00:26:15)
Chosen answer: It is never stated, however she must have been there several years if she is on presidential detail.