The inception of “NCIS” can be traced back to the “JAG” episode titled “Ice Queen,” which planted the seeds for the series and introduced iconic shots, such as the car driving down Pennsylvania Avenue towards the Capitol building.

Mark Harmon’s portrayal of Special Agent Leroy Jethro Gibbs is synonymous with the show, but creator Donald P. Bellisario initially considered actors like Scott Bakula and Don Johnson for the role before ultimately casting Harmon.

Several actors on the show have personal connections to their characters. For instance, Pauley Perrette, who played Abby Sciuto, majored in forensics, reflecting her character’s expertise. Michael Weatherly’s familial history also had resemblances to his character, Tony DiNozzo, adding layers of authenticity.

A family touch was embedded in the series with Sean Harmon, Mark Harmon’s son, frequently portraying a younger Gibbs in flashback scenes.

To maintain authenticity, “NCIS” consults with actual NCIS agents, and some have even made cameos on the show. However, certain actions depicted, like Gibbs’ signature head slaps, wouldn’t be realistic in a professional setting.

The show incorporates Easter eggs and set details, such as the Most Wanted board featuring crew faces and real criminals. Don Bellisario’s distinctive sound effect during act transitions has become a hallmark of the show’s production.

“NCIS” has featured star-studded cameos over its run, including appearances by Jamie Lee Curtis, Michelle Obama, and stars from other popular series like “Stranger Things,” adding an extra layer of intrigue to the show.

By chrysos