Yankee White - S1-E1
Trivia: During the flight on Air Force One, Gibbs mentions the Harrison Ford movie of the same name, and alludes to a double agent inside the Secret Service. The character he's referring to, played by Xander Berkeley, is also named Gibbs.
Trivia: When DiNozzo and Kate are examining the victim's lunchbox collection, the shelf the camera pans past has one of Quantum Leap, another Donald Bellasario show. (00:10:30)
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