Yankee White - S1-E1
Gibbs: I heard you quit, Agent Todd.
Kate Todd: Happy news travels fast. Yes, I resigned. It was the right thing to do.
Gibbs: Yep. Pull that crap at NCIS, I won't give you a chance to resign.
Kate Todd: Is that a job offer?
See No Evil - S2-E1
[Gibbs is drinking a cup of coffee.]
Kate Todd: Gibbs, it's like one hundred degrees in here. How can you drink that stuff?
Leroy Gibbs: It keeps me cool.
Ducky: I've learn't as much as I can from the dead. Time to start listening to the living. (00:34:20)
Singled Out - S4-E3
Abby: Awh, You and the director make cute Gibbletts Gibbs. (00:24:50)
Singled Out - S4-E3
Tony DiNozzo: And if you find anything, make sure you call Gibbs. Not me. (00:14:20)
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