Revealing mistake: During season 4 the same television clip of President Bush and VP Cheney disembarking Air Force One is used on the background television in the squad room. In some cases the clip is running and not in unison, on three of the televisions in the same scene from shot to shot.
Continuity mistake: During the scene where Gibbs chases Shariff into the railway station restroom, Gibbs' position on The Wall changes, his gun hand passes the corner of The Wall at least three times. Also as he starts to fall to the floor, the long shot from low angle close to the urinals shows Gibbs holding the gun with both hands and they are moving to his right, his left shoulder going into he wall. At the cut, the gun is in his right hand only and moving across his body to the left and his right shoulder is now going into The Wall. The shot cuts to Shariff, who has moved about a foot to his right during the cut, then cuts back to both Gibbs and Shariff, Shariff has returned to his original position and the gun has moved to Gibbs left hand, although we don't really see the gun until he falls and Shariff picks it up, thus ruling out the possibility of the gun being dropped before he falls. (We do hear the gun hit the floor as he falls.) (00:40:10)
Continuity mistake: When Sharif calls Gibbs to gloat, when Sharif ends the call, the shot cuts to Gibbs closing his cell phone, shot cuts to McGee and Col. Mann, when it cuts back to Gibbs, he is closing his phone again. We can even hear the phone close both times. (00:33:10)
Continuity mistake: During the scene where Tim and sister Sarah are working on the past evening's timeline, Sarah's clothes lying on the counter change position between the wide shots and the close-ups. Also the plastic her shoes are sitting on in the wide shots disappears in the close-up when she removes them and when she picks up the baggie of money. The screen shot of the locations in the time line also change locations. The 9:30 and 10:00 individual locations show up in the Georgetown University area but when they zoom out to show all three locations, the two time location now show the George Washington University, Foggy Bottom area of D. C., and it shows Tim's residence as being in Arlington National Cemetery. (00:06:35 - 00:07:50)
Once a Hero - S4-E8
Revealing mistake: When Ducky and Gibbs are in the morgue examining the body of the girl found in the hotel, the camera cuts for a few seconds to the girl lying on the slab. During that shot, you can see her neck moving to her pulse (just after Ducky says, "There's some bruising on the sternum"). (00:19:10)
Continuity mistake: When Abby is talking to Gibbs about getting a tattoo, he goes from looking at her computer screen to her in between shots. There's a straight cut, so there was no time for him to turn his head. (00:06:55)
Factual error: Lieutenant Colonel Mann explains to the NCIS team that a "99 Toyota" is the only unaccounted for vehicle from the golf course bombing. The vehicle is a Toyota but is obviously a mid-80's Corolla, with the last production year being 1987, making it over a decade older than Mann claims. Additionally, she would not have know the year of the vehicle prior to the team running the plate, nor would she have pointlessly assumed its year. (00:32:06)
Continuity mistake: When Gibbs rejects the agent's file, Cynthia reaches for the ringing telephone with her right hand and Gibbs stops her with his left hand, but in the closeup Gibbs has his right hand on Cynthia's left hand. The closeup is a flipped shot, note their watches. (00:03:05)
Other mistake: When Ziva signs the will, she signs it with her real name - "Cote" is visible.
Suggested correction: No. We see in the closeup Ziva David writing her name, and the shot cuts away just as she starts to write the last "d" in David (timecode 00:28:00).
Continuity mistake: When Tony tells Ziva he won't help her track down the remaining 'Smiths', a woman in the background is walking down the stairs; as Tony stands up, she takes two steps down from the lower landing. When the camera shot changes on Tony, she's back on the landing. (00:25:15)
In the Dark - S4-E22
Revealing mistake: When Tony is telling Gibbs & Ducky that Abby got a hit on the dead sailor's fingerprints, Gibbs takes the file from Tony; the camera shows the file, which appears to be a legitimate profile sheet, but in the comments section, is the script that Tony just read aloud. (00:07:36)
Continuity mistake: When Gibbs is at the batting cage with Col. Mann, he raises his bat, ready to swing. In the next shot, his arms are down by his side and he raises the bat again. (00:02:30)
