Other mistake: It would appear that (as late as early-Season 5), almost all screen shots of computer forensics include the same hard drive properties screen - it seems to be the same hard drive each time - 111GB, with 93GB used and a 129kb private container on it. I have not noticed whether they are all named drive G:, but several have been. The only thing that changes is the 'header' section, which is manipulated each episode to show something specific (but not real) for the TV audience to read.
Continuity mistake: We are often shown the same NCIS form used for searches. However the form is constantly changing design. Even in the same episode on some occasions.
Factual error: Throughout the show, skyscrapers are consistently shown. The height of buildings in Washington DC is restricted by the Height of Buildings Act of 1910, and there are no buildings taller than 13 stories.
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