Origins has revealed what really happened to Leroy Jethro Gibbs' late wife and daughter in a complete shocker of a twist.

The show began all the way back in 2003, and though many "NCIS" actors have left the series, the fans don't miss any of them ...

While the cast has rotated quite a bit over that time, Leroy Jethro Gibbs, played by Mark ... Harmon provides voiceover narration as Gibbs throughout the series. "NCIS: Origins" isn't the first ...

It has already been confirmed that while actor Mark Harmon won’t be a recurring figure in the show, not only does he narrate the series, he does briefly show up in the first episode. Set in 1991 ...

Monica Schipper/GA/The Hollywood Reporter via Getty ; Bryan Bedder/Variety via Getty Amanda Pacheco and Wilmer Valderrama; Maria Bello and Dominique Crenn.

NCIS is set to return to our screens with a prequel series, NCIS Origins, which will delve into the early days of Leroy Jethro Gibbs' career in the 1990s ...

Their tragic deaths last month rocked Hollywood, and now new information has come to light surrounding Gene Hackman's wife's ...