Continuity mistake: The year Gibbs joined NCIS is inconsistent. It is revealed in this episode that he joined the NIS in 1992, the same year it became NCIS. But in the JAG crossover episode "Ice Queen", Gibbs tells Commander Rabb that he has been an agent for 19 years, which suggests that Gibbs joined NIS in 1984. And in "Singled Out" in season 4, McGee mentions that Gibbs has been an agent for roughly 16 Years, which would put Gibbs' joining NIS in 1990.
Continuity mistake: When Gibbs, Tony and Ziva Rendezvous with McGee outside the enlisted club, to search for Sgt. Porter, McGee puts his NCIS ballcap on twice. (00:09:15)
Silver War - S3-E4
Continuity mistake: When Ziva, Ducky, and Dr. Burns find the graveyard, Dr. Burns is visible between Ducky and Ziva's shoulders. She then disappears in the following wide shot, and appears again in the closeup. (00:39:40)
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)
Continuity mistake: When Gibbs thumps Tony on the back at the storage locker, his hand is balled up in a fist. In the next shot, Gibbs' hand is extended flat. The pen in Gibbs' hand also disappears. (00:04:45)
Continuity mistake: During the conversation between Jackson and Ziva, a $20 bill is dropped, face down. When Ziva bends down to pick it up, the bill is now face up.
Visible crew/equipment: Two crew members are visible on the right lens of Jenny's sunglasses just before she enters the deserted diner. (00:23:15)
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)
Continuity mistake: In one scene, Tony observes that Ziva never uses contractions when she talks, and Ziva even seems confused as to what they are. But in previous episodes, Ziva not only knows what contractions are, but uses them frequently.
In the Zone - S5-E15
Continuity mistake: When DiNozzo wonders why Jardine came on the mission to Iraq, Jardine's hands move from gripping her pack straps to hanging down at her sides. (00:16:00)
Continuity mistake: "Patriot Down": The beach scene in the opening sequence is repeated at the end, but the dialogue differs the second time. Gibbs is kneeling on the sand when someone puts a gun to his head and says, "Welcome to Mexico." When Gibbs reaches for his weapon, the voice growls, "Don't even think about it." These two lines are delivered in reverse order when the scene replays at the end.
Chosen answer: It is never stated, however she must have been there several years if she is on presidential detail.