Yankee White - S1-E1
Factual error: Air Force One landed in Wichita, Kansas. The local coroner claimed Jurisdiction for Wichita County. The city of Wichita, Kansas is in Sedgwick County, in southern Kansas. Wichita County, Kansas is in western Kansas, about 250 miles from the city of Wichita. (00:05:40)
The Truth Is Out There - S1-E17
Revealing mistake: Gibbs finds a bunch of cash hidden in the victim's speaker. "For Motion Picture Use Only" is printed on them.
Factual error: The episode takes place on the Destroyer DD 964 U.S.S. Paul F. Foster, but every time the ship is shown sailing past the camera you see the number 51 on the side. This is the number of the U.S.S. Arleigh Burke, a DDG not even the same class of ship. (00:11:15)
Yankee White - S1-E1
Deliberate mistake: Fornell doesn't recognize Gibbs, but subsequent episodes establish they have a long history together.
Character mistake: When Gibbs shows Major Dorden his badge, his ID card is upside down. (00:06:00)
Visible crew/equipment: When the "militia" guy fires the MP5 at the mannequin, after the last closeup of that mannequin it then cuts to a long shot facing the militia members, Gibbs, and Stone, and two crew members (one in shorts and the other wearing jeans) are visible at the top right side of the screen. (00:38:15)
Visible crew/equipment: When Tony tries to buy the sword for $500 the saleswoman walks away, and as he agrees to $600 in a following shot, the blue T-mark is visible on the floor. (00:23:10)
Factual error: In the yacht rescue scene the "American" crewed helicopter is actually an Australian crew. The rank on his shoulder shows an Australian Lieutenant Commander. (00:34:30)
Yankee White - S1-E1
Deliberate mistake: After the bad guy obtains a weapon from the armory on Air Force One, he pushes the door shut. It is heard to latch correctly, but a few seconds later when Special Agent Gibbs comes, the door is now seen to be slightly ajar. (00:38:55)
Marine Down - S1-E9
Visible crew/equipment: In the final scene, the camera, crew and light panels are briefly captured reflected in the door of the silver sports car when Gibbs gets in. (00:43:00)
Yankee White - S1-E1
Continuity mistake: Agent Todd is standing there coat open, hands in her pockets on Air Force One watching Gibbs walk away when the bad guy who is a reporter (Leonard) comes up to her and comments "Loosening your dress code Kate". Seconds later when she turns to indicate that he should return to the press section her coat is now buttoned up. (00:33:50)
The Truth Is Out There - S1-E17
Continuity mistake: When Gibbs shows Darin Spotnitz the photo of Petty Officer Gordon and asks if he recognizes him, Gibbs' hand jumps from the top of the photograph to the side. (00:05:45)
Continuity mistake: Tony boards a helicopter to go to Puerto Rico. When he lands, it's a different one. The first has the number 406 on its side.
The Truth Is Out There - S1-E17
Character mistake: Gibbs and Ducky are in Autopsy, with Ducky describing lower-leg injuries of a deceased Petty Officer. The two bones in the lower leg are the tibia and the fibula; however, Ducky, a doctor with decades of experience, referred to the injuries as fractures of the "tibia" and "fibia." (00:13:05)
Visible crew/equipment: In one of the first episodes (2nd or 3rd) of Season 1, in an interrogation room scene, the camera pans around the table, and a crew member is visible in the far wall mirror, standing beside the camera in front of Gibbs.
Factual error: While the NCIS crew are working a crime scene, Ducky starts yet another parable about his past experiences, referring to the dating of an Indian skeleton by the caliber of the bullet, "a 40-75". He states that since he knew the year that the US Army used that caliber, he could accurately date the remains. Unfortunately for Ducky, the US Army never used a 40-75. It did, however authorize a contract for a 45-70 cartridge in 1873. (00:09:20)
Audio problem: When Tony is speaking with the commander on deck, he says he is waiting for "the next aircraft." But his lips don't match the words. (00:11:46)
Chosen answer: It is never stated, however she must have been there several years if she is on presidential detail.