Visible crew/equipment: Lighting equipment is reflected in the director's sunglasses when she tells Tony and Ziva that they can have the rest of the trip off at the funeral. (00:03:30)
Visible crew/equipment: Two crew members are visible on the right lens of Jenny's sunglasses just before she enters the deserted diner. (00:23:15)
Visible crew/equipment: When Vance enters the Annex to locate the old file, in the first overhead shot a green tape mark is visible on the floor, in front of Ziva and Tony. (00:32:45)
Visible crew/equipment: When Abby drops the CDs there is a yellow tape marker by one of the cases. (00:52:00)
Visible crew/equipment: When McGee asks Abby for the next batch, she turns around and a yellow tape marker is visible on the floor. (00:52:00)
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