Continuity mistake: When Ziva dumps the four bundles of $100.00 bills on the bed, they all land face up. Then the scene changes to Tony taking a picture of them. Back to the bundles, and now only three are face up and one is face down, with no one touching them. (00:10:40)
The Missionary Position - S9-E20
Continuity mistake: When Ziva and Monique confront the two CIA agents in the car, the woman's hand keeps alternating from on the wheel to off the wheel. (00:36:00)
Till Death Do Us Part - S9-E24
Visible crew/equipment: When Dr Ryan is talking to Vance, a light screen is reflected in her sunglasses. (00:04:30)
Up in Smoke - S9-E23
Visible crew/equipment: When Ziva walks into the interrogation room after the sting, the camera and operator is visible in the mirror. (00:34:30)
Up in Smoke - S9-E23
Continuity mistake: When Dr Ryan holds out her hand for the file from Gibbs at his house, the hand she holds out switches between shots. (00:17:40)
Visible crew/equipment: Gibbs walks into Abby's lab while she's resting under the desk, and when Gibbs helps Abby stand up the bouncing shadow of the boom mic/pole is visible at the top, right side of the screen. (00:26:20)
Visible crew/equipment: When Ziva and Tony arrive at the crime scene, a visible marker is on the floor exactly where McGee comes to stand. (00:03:50)
Continuity mistake: When DiNozzo has got the victims watch on, it's on over his white glove. When the shot changes it's now over his bare skin and not the glove. (00:10:20)
Visible crew/equipment: When reading the background of the victim, a blue tape marker is visible under McGee's desk. (00:06:50)
Visible crew/equipment: As the team are just leaving the office for the crime scene, as Tony walks away from his desk, a yellow tape marker is visible on the floor. (00:03:40)
Visible crew/equipment: When Ziva and Gibbs are searching the changing rooms, the camera crew are reflected in The Wall mirrors. (00:12:50)
Continuity mistake: When we see young Gibbs sanding the birdhouse, the way he's holding the bird house changes between shots. It goes from being upright to on it's side. (00:35:30)
Continuity mistake: When Gibbs is looking at the photo of the Dog Tags in his basement, the way he holds the photo changes between shots. (00:19:20)
Continuity mistake: The bottle of Pepto Bismol that Fornell places on the counter at the start simply vanishes from the shot. (00:04:05)
Safe Harbor - S9-E5
Continuity mistake: The way DiNozzo holds the little black book changes between shots when he is first examining it. (00:11:20)
Safe Harbor - S9-E5
Visible crew/equipment: When Borin leaves to sign for the body, a little tape marker is visible at Gibbs' feet. (00:12:05)
Continuity mistake: When the victim falls to the ground in the pre-title sequence his eyes are closed and a pool of blood spills onto the floor from his mouth. When Tony and Ziva are examining the body and taking photo's of the victim, his eyes are now open and the pool of blood is gone from by his mouth. (00:00:50 - 00:03:10)
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