Visible crew/equipment: When Gibbs pulls the U-turn, there are markers visible on the road to indicate where to do the turn. (00:29:55)
Continuity mistake: Gibbs asks Abby what she has got for him. Abby lists all the stuff she has found and holds up the magazine with 2 hands. Camera cuts and now she is holding the magazine in one hand. (00:09:30)
Visible crew/equipment: At the very start as the camera pans over the sign saying base housing, the camera crew are reflected in the sign. (00:00:10)
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)
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)
The Truth Is Out There - S1-E17
Continuity mistake: When walking down the alley at the start their position is constantly changing forward and back. Note the new cement patch. (00:02:00)
Bete Noire - S1-E16
Visible crew/equipment: When Gerald starts to open the body bag, the film crew are reflected in the fridge door behind him. They are blurry but distinguishable by the fact the shapes move when no-one else does. (00:01:05)
Continuity mistake: At the naval base Gibbs is talking about the Marine taking his bike up into the mountains and blasting country music. The person he is talking to has their arms down by their side until the camera changes. They are then behind his back. (00:22:00)
Visible crew/equipment: When Tony stands up and walks over to Kate at the start, a blue tape marker is visible on the floor from where he starts walking. (00:01:35)
Continuity mistake: When walking down the stairs at NCIS discussing the feather, the evidence bag Kate has switches hands instantly for a couple of seconds. (00:28:30)
Marine Down - S1-E9
Continuity mistake: After speaking with the colonel about the incident, we see an aerial shot of the colonel and a marine walking off, leaving the 3 NCIS agents on their own with no-one behind them. As the agents start walking a marine appears behind them. (00:09:00)
Chosen answer: It is never stated, however she must have been there several years if she is on presidential detail.