Continuity mistake: At the start, the phone screen is lit up, receiving a call. However, for one very quick shot, the phone screen is off and not receiving a call. (00:02:00)
Continuity mistake: At the start, the position of the phone on the floor changes between long and close-up shots. Note the floor markings in relation to the phone. (00:02:00)
Continuity mistake: Gibbs gives his report to Vance, who opens the folder, and it's one page. Vance is then holding the folder open, and the camera changes to a second angle where you can't see the folder but can see Vance doesn't move his arm an inch. The camera changes to a third angle, and now the folder is closed. (00:18:20)
Continuity mistake: When Tony is holding out the phone to the ladies walking past him, you can see on the phone's screen Ziva and McGee, who are stood in front of a fixed screen at NCIS. In this shot of them, you can see part of the orange wall of the office. Gibbs then walks in next to McGee. When Tony realises Gibbs is there, the orange section is no longer visible, meaning the camera has changed position. Even if McGee, Gibbs, and Ziva had moved, the orange wall should still be visible since the camera is fixed. (00:16:50)
Continuity mistake: When Tony is on a video call with Ziva and McGee, in the shot of Tony holding out the phone, there is no-one in the pool by the orange towel. When we see the same shot from the video call in NCIS, two people have appeared by the orange towel with no time to move into position. (00:16:30)
Continuity mistake: When Gibbs speaks to the Metro detective, the way the officer next to him holds the sheet of paper on his notepad changes between shots. (00:06:50)
Continuity mistake: When Gibbs is planing wood in his basement for the first time, pay close attention to his tool. It has no blade in it at all. (00:11:50)
Continuity mistake: The hostage was shot above his right knee, but when he is being medically tended to, the bandage is wrapped under his knee.
Continuity mistake: We see a close-up of Kevin's poster that Ziva is holding. In the close-up, she is holding the poster on the right-hand side. When the shot changes to a wider shot showing Ziva and Tony, Ziva is no longer holding the poster on the right-hand side, but is now holding it on the bottom. (00:04:40)
You Better Watch Out - S10-E10
Continuity mistake: When Jimmy is talking about the smell of dead bodies, his mask is either on or off depending on the shot. (00:02:40)
Chosen answer: It is never stated, however she must have been there several years if she is on presidential detail.