FAQ for
"Navy NCIS: Naval Criminal Investigative Service" (2003)

Semper Fidelis (aka Semper Fi) means "Always Faithful" in Latin - It's the Motto Of the US Marine Corps and a common greeting between Marines. Both those currently active, reserves, and discharged. Once a Marine always a Marine, there are no "former" or "ex" Marines.

Periodically Gibbs mentions a rule. In Season 3 episode, Switch, Gibbs tells Ziva there are about 50 rules.

Gibbs has been married 4 times, divorced 3 times. His first wife Shannon, and their daughter Kelly were killed while he was on a deployment. He managed to keep this marriage a secret from his friends and colleagues for many years.

First wife Shannon (killed) First wife after Shannon death ?? Second wife Diane Third wife - Stephanie Bronwyn Flynn