Origins episode “All’s Not Lost” are ahead! Throughout the course of Mark Harmon’s nearly-two-decade run on NCIS, viewers learned quite a bit about his character, Leroy Jethro Gibbs, including how his first wife,

But sharp-minded viewers will remember that "NCIS" gave us a peek at this moment already. During "Hiatus, Part 1," Gibbs is also seen learning the same news, and there are a large number of differences between what happens in "NCIS" and "All's Not Lost.

NCIS: Origins dives into a dark part of Gibbs’ ( Austin Stowell) past, when he learned of his wife and daughter’s murders while overseas in Kuwait in flashbacks.

The case of a missing little girl coincides with the moment that changes Gibbs' Life. Read the spoilers for NCIS: Origins Season 1 Episode 4!

With the NCIS: Origins prequel, we’re seeing a Leroy Jethro Gibbs ( Austin Stowell) for whom the loss of his wife Shannon and daughter Kelley is still fresh. Over the first three episodes, we’ve gotten flashbacks as well as a heartbreaking sequence of Gibbs and Shannon in his truck talking about the rules.

Origins" Season 1, Episode 4 -- "All's Not Lost" Leroy Jethro Gibbs (Austin Stowell) may be an ace with a gun and a confident negotiator, but he's got a secret skill that many people in his field will never attain -- an easy way with children.