Continuity mistake: When Abby chucks the polystyrene in the box, its position changes between shots. (00:18:10)
In the Dark - S4-E22
Visible crew/equipment: At the start, when Mr. Scott's assistant walks in, the T-mark is visible on the floor in front of the darkroom's door. (00:05:00)
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)
In the Dark - S4-E22
Continuity mistake: When Ducky finds agent Lee's bra, he has some sticky labels in his hand in one shot and not in the next. (00:08:15)
In the Dark - S4-E22
Audio problem: When Abby is saying how she quit caffeine, the audio in the long shot doesn't match up with her mouth and is a clear overdub. (00:10:40)
In the Dark - S4-E22
Continuity mistake: Don gets a folder out of the bottom draw of his desk, camera changes and he's closing the top drawer. (00:13:15)
In the Dark - S4-E22
Continuity mistake: Don explains what the investigation is about, and while doing so he has his hands clasped together. Camera changes and they are spread apart. (00:13:20)
In the Dark - S4-E22
Visible crew/equipment: When Don explains how he was about to call NCIS, he leans over to get a folder out. When he does, the camera shadow can be seen moving along the back of his head. (00:13:50)
In the Dark - S4-E22
Character mistake: On the message board visible in the background when the team is discussing Wong, the word "Artillery" is misspelled "Artillary". (00:18:20)
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)
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)
Continuity mistake: When Jenny hands the Russian a cigarette the packet goes from green to red. (00:39:50)
Visible crew/equipment: When the car pulls away from the airport at the start the crew are reflected in the paintwork. (00:00:40)
Continuity mistake: When Jen is asking who's been in her study she points with her hand holding the letters at the end. Camera cuts and now she is holding the letters by the middle. (00:03:40)
Continuity mistake: When the mule asks for a cast he is told after surgery. At this point he raises his hand above his head. Camera cuts and it's back by his side. (00:06:30)
Factual error: When McGee is tracing the who sent the request for the polygraphs, the map bounces around the world. When he says Kurdistan, the map shows Armenia, and when it hits the Dominican Republic, McGee says Puerto Rico. (00:26:50)
Answer: I hadn't seen the backdoor pilots yet but while it wasn't explicitly stated, at least onscreen, I heard somewhere Vivian got either fired from NCIS due to jeopardizing a case, got resigned from the agency, or transferred to the FBI.
Raykvega423