Murder 2.0 - S6-E6
Continuity mistake: When NCIS catches the killer, the way he holds a dead man's switch changes. In some shots, he holds it with all five fingers, and in others he holds it with his middle two fingers and thumb, with his index and pinkie fingers extended. (00:39:45)
Murder 2.0 - S6-E6
Continuity mistake: At the end, McGee has his headphones in both ears. Camera changes and now 1 earphone is out. (00:40:20)
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