Continuity mistake: The banana peel on DiNozzo's index finger, healing his owie, moves to his thumb in one shot. (00:12:00)
Revealing mistake: When Abby and Palmer tell Gibbs about General Gadet, Palmer notes that Ellie has been trying to find his last location, and Ellie replies, "Which I think I have and something more." Then Ellie walks over to Gibbs with her laptop to show him the NSA intel report about General Gadet. The problem is the first sentence of the NSA report reads, "Which I think I have and something more," which was Ellie's reply in the dialogue, and a few lines down are three paragraphs of nonsensical filler text. (00:31:00)
Revealing mistake: While Ellie and George are in the attic, Ellie uses her laptop to access contact info and gets Richard Doogan's DOD military service record. There's a closeup of the laptop screen as she begins to read aloud, but the problem is part of the paragraph reads, "And he's only a few hours away in Kansas..." and especially "I need to update Gibbs" which are Ellie's lines in the dialogue with her brother. (00:16:45)
Visible crew/equipment: When "Nanook" stands beside his desk while he tells Tony and Ellie about Delilah's mother, there's a blue T-mark on the floor by McGee's feet. (00:03:05)
Visible crew/equipment: While Gibbs is in the lab reviewing the toxicology report with Abby she notes the organic red dye. When Gibbs heads to the door, just as Abby asks if he wants to know how Diego died, the pink T-mark is visible on the floor where Gibbs stands. (00:25:05)
Visible crew/equipment: While Gibbs is at the diner with Dr. Taft and his wife he gets a call from Ellie, and when it cuts to the overhead shot of Gibbs, Ellie, and Tony walking toward each other, on the ground we can see the reddish chalk mark (for Gibbs) and two white chalk T-marks (for Tony and Ellie) where the three actors meet. (00:26:10)
Continuity mistake: During Delilah and Tim's dinner, when Delilah places corn on the cob onto Tim's plate note the positions of the broccoli and shrimp. In the following shots the broccoli and shrimp repeatedly switch to opposite positions. (00:13:45)
Chosen answer: It is never stated, however she must have been there several years if she is on presidential detail.