Continuity mistake: 5-4: Identity Crisis. When Ziva is speaking with McGee her lapel changes from being turned up and laying down.
Continuity mistake: When he hands Tony the autopsy report, Ducky has hair falling over his forehead, then combed back, then over his forehead again repeatedly from shot to shot. (00:07:15)
Other mistake: Season 5, Episode 12, "Stakeout": The picture on McGee's camera phone is just wrong. It shows not just the man in front of him, but it also shows a hand, holding a camera phone - McGee's camera phone. In other words, the phone is showing a picture of itself and the man, instead of just the man. (00:40:25)
Factual error: There is a big deal made about Gibbs giving Shepard one of his magazines in the study with La Granoille. It is implied that that magazine was used in the gun to kill La Granoille on his yacht. The magazine he gave her was for his department issued Sig Sauer P228, however, he was killed with a Glock 19. The magazines are not compatible.
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)
Continuity mistake: When Gibbs is trying to talk Lt. Arnett out of jumping off the ledge, Gibbs is relatively close to Arnett in the middle of The Wall when Ducky and Abby watch the live news report, but in real time, Gibbs is over at the far left corner of The Wall. (00:04:10 - 00:05:00)
Continuity mistake: When Gibbs is comparing McGee to the FBI agent's ID badge, Gibbs' left hand disappears from the bottom of the badge. (00:16:10)
Visible crew/equipment: After Gibbs tells his team to go to Arnett's apartment, Ziva shares her opinion that Tony is more afraid of heights than Probalicious, then as McGee walks away some chalk T-marks are visible on the ground. (00:08:05)
Visible crew/equipment: When Vance enters the Annex to locate the old file, in the first overhead shot a green tape mark is visible on the floor, in front of Ziva and Tony. (00:32:45)
Continuity mistake: After Ducky finds the needle in the MRI machine it cuts to Gibbs stepping on the bubble wrap, and as Abby happily rolls toward Gibbs, in the two shots facing her the headband magnifiers are flipped down over Abby's eyes, but in the shot facing Gibbs the magnifiers are flipped up over Abby's head. (00:27:30)
Continuity mistake: During season 4 when Ziva gets worried about Tony being 'sick', she is researching y. Pestis, and telling Gibbs how worried she is about Tony having tests and the long-term effects of plague. In season 5, first episode, when Ducky comes to tell the group that the body is not Tony because "he didn't have plague", Ziva looks confused and says "before my time?"
Visible crew/equipment: When Abby drops the CDs there is a yellow tape marker by one of the cases. (00:52:00)
Visible crew/equipment: When McGee asks Abby for the next batch, she turns around and a yellow tape marker is visible on the floor. (00:52:00)
Revealing mistake: When Tony takes the book off Ziva, look at the cover. It's upside down. (00:10:20)
About Face - S5-E17
Continuity mistake: When McGee is walking up the steps to the body, he is holding his camera with his left hand in one shot and then the banister in the next. (00:03:15)
In the Zone - S5-E15
Continuity mistake: McGee is looking at a report at the end and we see the page he is looking at has a few lines of text. Nothing much. Camera cuts to a close up of the report and the page is completely different. (00:38:40)
In the Zone - S5-E15
Continuity mistake: At the end, Gibbs gives Ziva a file and she takes it in one hand. Camera does an instant cut and she now has the file open in her hands and a couple of pages in. (00:38:30)
In the Zone - S5-E15
Continuity mistake: When in the square Tony's ID goes from being caught up on his jacket to hanging neatly depending on the shot. (00:16:20)
Continuity mistake: Just as Vance says about Abby being smarter than Fornell gives her credit for, he is holding his toothpick. Camera cuts and he is no longer holding it. (00:22:15)
Chosen answer: "Policing your brass", means to pick up your expended shell casings, after firing your rifle, or pistol.