Continuity mistake: When Jimmy and Ducky are giving a run-down of the suspect to Gibbs, Jimmy puts a Sharpie in his mouth and lowers his hand. When the shot changes, he's got his hand on the Sharpie again. (00:23:50)
Continuity mistake: At the end, the way Ziva points to the photo on The Wall changes from one finger to an open hand between shots. (00:37:15)
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: 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: When McGee tells Tony to stop with the pen, Tony has his thumb up in the rear shot and down in the front shot. (00:04:20)
Visible crew/equipment: When Gibbs and Ziva are in the "safehouse" Ziva set up for Ari, a crew member and his boom microphone are seen on the left of the screen, right before Gibbs climbs the ladder to remove the hidden camera spying on them. (00:30:10)
Continuity mistake: When Tony shows Chandler's boarding pass to McGee for photo evidence, Tony's hand moves from holding the upper edge to the lower edge. (00:04:15)
The Truth Is Out There - S1-E17
Revealing mistake: Gibbs finds a bunch of cash hidden in the victim's speaker. "For Motion Picture Use Only" is printed on them.
Visible crew/equipment: In the scene where Tony approaches the Mallard residence by car for the first time, there is a stage light, complete with filter(?) on the balcony. (00:13:50)
Continuity mistake: 7.05 - Code of Conduct. Gibbs and Tony go to question a marine who is exercising. The sweat stains on his shirt get much bigger and smaller, as well as change shapes, throughout the interview. (00:20:35)
Character mistake: When Gibbs shows Major Dorden his badge, his ID card is upside down. (00:06:00)
Continuity mistake: When Tony enters the NCIS interrogation room with Fornell, he sits down and places his bag of potato chips on the table. In the next shot, the bag has disappeared, he removes it from his jacket pocket, and places it on the table again. (00:25:15)
Visible crew/equipment: At the start of the sexual harassment class, when Tracy Taylor explains, "A coworker shows you a cartoon or photo of a sexual nature," we can see three orange T-marks taped to the floor near her. (00:02:55)
Continuity mistake: When Gibbs has the Mafia boss against the car, his arm is across the Mafia guy's chest. Camera cuts and now it is right next to his neck. (00:34:50)
Continuity mistake: Just after Fornell is arrested, the agents are showing NCIS their surveillance of the mafia. When doing so, the headset on the one agent changes position instantly. (00:22:00)
Chosen answer: It is never stated, however she must have been there several years if she is on presidential detail.