NCIS is up there with some of the longest running TV shows in history, having been on our screens for 14 years and counting.

Image SourceWe’ve been hooked by the team of NCIS special agents and their investigations for 14 seasons, but even the biggest hardcore fans have been missing out on some surprising facts about the show for all these years.

Well, prepare to be amazed by this rare look behind the scenes of one of American’s most famous TV shows.

It’s Actually Filmed In Santa Clarita, CA

Whilst we all know the series is set in Washington D.C., the majority of the filming takes place in Santa Clarita. The Washington Navy Yard is set far away from the famous landmarks and buildings in D.C., but producers and set designers put them a lot nearer to the team’s window to give a more accurate view.

Donald Bellisario Was A Real Life Marine

Bellisario, the creator of the show, served in the U.S. Marine Corps as a Gunnery Sergeant – this helps out in the series as all the Marine Corps inside knowledge and methodology comes from someone’s real life experience.