
Bikini Wax - S2-E18
Continuity mistake: When Gibbs shows his identification to Jonathan Redding's supervisor, he holds the badge from the top of the wallet, then at the bottom, then back at the top. (00:26:40)

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)

Continuity mistake: When Palmer and Ducky are in Autopsy and Palmer is scratching his itching back, his hand disappears and reappears over his shoulder. (00:07:40)

Continuity mistake: Episode 7-20, "Moonlighting": When Palmer approaches Ducky with the rabbit's foot he thinks is a human bone, the bone jumps from his right hand to his left. (00:20:00)
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