Factual error: The intro shows a flashback from 1994 where young McGee is using a PC with Windows 95, which was not released until late 1995. (00:00:35)
Revealing mistake: When Gibbs' flip phone started ringing, and he flipped it open to answer it, for the brief second, in the closeup shot of the flip phone, the screen on the phone says "No Service" despite receiving an incoming call.
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