Scene shows Gibbs opening pay phone with his knife. That pay phone requires 2 keys to open properly or a drill with a carbide drill bit. Drill 4 holes on that face plate. Open with a knife, not going to happen.
The Cobra is supposed to be a Marine aircraft. The Marines and Navy use dual engine helicopters. The Huey flying above is also single engine but may be from a local National Guard with single engines.
At 06:20- Abby is looking at a faked picture: the trees in the tree line cast shadow but the helicopter does not.
At 25:11- McGee is handling crime scene evidence without wearing gloves.
Near the end of the show, when Gibbs calls Col. Teague, the colonel answers, saying "Go for Teague" before he has the phone up to his mouth.