Aliyah

Vance and the team are seen arriving in Tel Aviv on a C-130. The straight line air distance from DC to Tel Aviv is 5,890 miles, and the cruising speed of the C-130 is 336 mph. With mid air refueling (some versions of the C-130 have mid air refueling capability) the flight time would be 17.5 hours. The range of the C-130 is 2,360 miles, so it would have required at least 2 mid air refueling. If the C-130 they were flying in was not mid air refueling capable the plane would have taken a more zigzag route with several refueling stops and increasing the flight time to 20 hours or more. It would have been much quicker if they had taken a jet powered aircraft such as the C-17.

The C-17 Globemaster is operated by the United States Air Force and the Air National Guard, whereas NCIS is Navy and the Navy's primary cargo and transport plane is the C-130 Hercules. NCIS does not have the budget to charter the use of a military plane whenever they want, they would have used a transport that was already scheduled to travel to Tel Aviv which would more than likely be a C-130. Plus the C-130 costs half as much to operate, especially when carrying light cargo, per hour as a C-17 and when lightly loaded a C-130 isn't that much slower than a fully loaded C-17 and because of their high operating cost C-17's are almost always flown fully loaded. For comparison the C-130's maximum weight is 155,000 lbs (70,307 kg), with an average cargo load of 100,000 lbs with a top speed of 320 knots (370 mph, 590 km/h); whereas the C-17's maximum weight is 585,000 lbs (265,352 kg) with a max cruising speed of 450 knots (520 mph, 830 km/h), though they usually cruise under 400 knots when fully loaded.

Ziva says Mossad uses a tactic of placing activated charcoal filters soaked in ethanethiol over cut gas lines to mask the smell. This does not make any sense, charcoal filters can absorb odors but not enough to mask the odor of natural gas. And adding ethanethiol would not help, it would do the direct opposite as ethanethiol is the chemical that gives natural gas its strong and unpleasant odor.