Continuity mistake: When Kate and Gibbs are driving in the car, Kate's laptop is either on or off depending on the shot. (00:31:00)
Continuity mistake: Duckey says there are 3 ways to kill a mongoose, while he has some form of medical instrument in his hand. However when he bends down to point at the victim's face, the instrument has disappeared. (00:04:10)
Visible crew/equipment: When Caitlin refers to Gibbs as a Gloomy Gus it then cuts to Tony with Abby, and in the following shot facing the glass doors, the reflection of the camera and its operator are visible as they move toward the left of the screen. (00:14:05)
Visible crew/equipment: When Tony open the van's back door to show Abe's "daughter" the weapons they are alone, with Gibbs taking their photos from across the road. There's a closeup of the case of LAWs, and in the next shot a crew member (looking at the actors) is visible at the left side of the screen, standing directly behind them (she's in this shot only). (00:16:10)
Visible crew/equipment: When the "militia" guy fires the MP5 at the mannequin, after the last closeup of that mannequin it then cuts to a long shot facing the militia members, Gibbs, and Stone, and two crew members (one in shorts and the other wearing jeans) are visible at the top right side of the screen. (00:38:15)
Visible crew/equipment: When it's discovered the M60s don't have firing pins Gibbs is pushed toward the green doors, and in the first closeup facing Gibbs the blue crash mat is visible at the bottom of the screen. (00:39:50)
A Weak Link - S1-E22
Continuity mistake: When DiNozzo and Gibbs are looking around the garage, DiNozzo starts to put his gloves on. Camera cuts and he's holding his gloves again. (00:12:00)
A Weak Link - S1-E22
Audio problem: When Gibbs tells DiNozzo to check every rope and D-link, DiNozzo says "You got it boss" however his mouth only says "You got it" (00:17:00)
A Weak Link - S1-E22
Revealing mistake: When Gibbs and Todd are walking into the church, the camera shadow can be seen going over the seats on the left hand side. There is no-one other than Gibbs and Todd moving and the shadows are not possible from them. (00:25:00)
Factual error: Special Agent Gibbs asks McGee how long Medical School takes in the UK, to which he answers 4 years. This is incorrect, because almost all aspiring doctors in the UK go through the Undergraduate Medicine route (MBBCh) which takes 5 years. When McGee performs a search on the computer, he enters "Medical Post Graduate" in the search criteria, which would be unlikely in real life. (00:24:27)
See No Evil - S2-E1
Continuity mistake: In the scene where Gibbs' phone breaks, and he tells McGee to "reboot" it, Tony is in the back, getting a phone out of the cabinet. He starts to give the phone to McGee. The next shot, the cabinet opens again, and Tony pulls out the phone again and gives it to McGee. (00:04:55)
See No Evil - S2-E1
Continuity mistake: When Gibbs leads Tony and Kate to MTAC, Tony extends his arm in a "ladies first" gesture to let Kate go ahead of him, then drops his arm to his side. In the next shot, his arm is extended again and he drops it a second time. (00:16:30)
Chosen answer: It is never stated, however she must have been there several years if she is on presidential detail.