Revealing mistake: When the team run from the Captain's office at sunset, Gibbs closes the door as the last man out. However, a shadow can still be seen to move over the door. We know there is no-one else in the office. (00:38:05)
Revealing mistake: Just after Agent Todd is seen going through the diary, there is a shot of the ship sailing past the camera. However the number 51 on the side of the ship is backwards, showing the shot is flipped. (00:30:20)
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