When narrowing down the suspect list, Abby says she found fibers that came from epaulets on an Officer's Bridge Coat. First, bridge coats don't have epaulets - they have loops for shoulder boards. Secondly, the loops are made of the same material as the coat itself.
Tony complains of the summer heat in Nogales, Arizona, presumably around 100 Fahrenheit. Ziva snaps "Stop complaining. This is what winter feels like in Israel." Jerusalem averages in the mid-50s Fahrenheit in winter; Tel Aviv in the 60s.
Closing scene when Gibbs throws a file folder on the crackling fire, the huge gas pipe under the ceramic logs is visible. Gas fires do not crackle.
No explanation of how the framed lieutenant is to made to "serve time" which he was said to deserve because he was a drug dealer, without the fact that he was framed for murder being disclosed in court; in which case Gibbs' corrupt mismanage of the case against the real murder could not be covered up.
Tony describes a diamond as "three carats, grade E, flawless, one minor inclusion". This is contradictory: by definition, a flawless diamond has no inclusions (internal flaws) or blemishes (flaws on the surface). A stone with one minor inclusion would be clarity grade VVS at best. "E" is the color grade and indicates that the diamond is colorless.
During the autopsy, Ducky says the victim's 'entire gastronomic tract was inflamed.' The proper word is gastrointestinal. Gastronomic refers to the preparation and eating of good food. The erudite Ducky would have known the difference.