Once a Hero - S4-E8
Revealing mistake: When we see Ziva having a close up look at the dead girl, the dead girl's eyes twitch and move slightly. (00:09:20)
Once a Hero - S4-E8
Revealing mistake: When Ducky and Gibbs are in the morgue examining the body of the girl found in the hotel, the camera cuts for a few seconds to the girl lying on the slab. During that shot, you can see her neck moving to her pulse (just after Ducky says, "There's some bruising on the sternum"). (00:19:10)
Once a Hero - S4-E8
Revealing mistake: When Ducky opens the fridge door containing the suspected killer, the dead body's eye twitches. (00:21:00)
Cover Story - S4-E20
Revealing mistake: When Ducky is holding the dictaphone, it is off as the display is blank. (00:13:45)
In the Dark - S4-E22
Revealing mistake: When Tony is telling Gibbs & Ducky that Abby got a hit on the dead sailor's fingerprints, Gibbs takes the file from Tony; the camera shows the file, which appears to be a legitimate profile sheet, but in the comments section, is the script that Tony just read aloud. (00:07:36)
Revealing mistake: Part 1 - As Tony eats his donut, and spills the jelly on his shirt, it's clear that (the actor) is moving his body to make that 'accident' happen as scripted. As the jelly begins to leak out, he doesn't move; because it doesn't fall as expected, he jerks suddenly, to make the jelly fall on his shirt. He stops moving, 'shocked' at this, holding the donut with both hands. Part 2 - The camera angle changes to 'behind' him, and he is only holding the donut with one hand. Part 3 - He then grabs at a napkin (just out of frame) to clean it off; the camera cuts to Ziva briefly, then back to Tony, who does not have any napkin. (00:24:55)
Revealing mistake: At the start, when the brain is being passed around you can see a fixed tube connecting to the student's arm to presumably pump the mercury into his hand. (00:01:20)
Revealing mistake: In a close up of the iPod there is 1 song on the play list, playing at the 29 second mark. However, the icon to indicate that the iPod is on repeat is missing. Therefore, the iPod has only been playing for 29 seconds, despite the fact the crew left a good time before the team arrived. (00:07:20)
Revealing mistake: When Ducky opens the fridge and uncovers the body, the man's eyes twitch. (00:21:20)
Lost & Found - S5-E9
Revealing mistake: The newspaper article on Lt Col Mann repeats the same few paragraphs throughout. Slow motion helps but is not required to spot this mistake. (00:12:20)
Revealing mistake: When Tony takes the book off Ziva, look at the cover. It's upside down. (00:10:20)
Revealing mistake: We see a close up of the money in the truck and the $100 note has got "This bill is for motion picture use only" printed on it. (00:05:40)
Revealing mistake: Agent Lang takes a picture of a debit card inside the first victims car which is a clearly prop. The name is "Jane Doe", and the card number is 1234-5678-9101-1112. (00:05:40)
Agent Afloat - S6-E2
Revealing mistake: When the officers wife is found dead at the start, look at her chest to see her still breathing. (00:03:20)
Murder 2.0 - S6-E6
Revealing mistake: When the NCIS team were directed to the first video, McGee states that they were the first to view the video, however, the view counter on the video said 531,817 views. (00:06:40 - 00:07:15)
Revealing mistake: At the crime scene we see Gibbs making notes on his notepad prior to Ducky calling him over. When he's looking at the business card you can see his notes in his notepad. However his notes are all just random lines and squiggles. It's not the case that he's made notes for himself in his own writing style. (00:04:00)
Chosen answer: It is never stated, however she must have been there several years if she is on presidential detail.