For nearly two seasons, NCIS: Origins has meticulously pieced together the puzzle of Leroy Jethro Gibbs' early years. From his rules to his brief marriage, the prequel has explored every corner of the legend. But one iconic piece of Gibbs lore has remained untouched—until now. In an exclusive sneak peek of the Season 2 finale, viewers finally witness the birth of Gibbs' signature head slap, the move he would later use to keep Anthony DiNozzo in line.

The clip, set to air on May 5, finds the Camp Pendleton office on the brink of closure. The team, including Gibbs (Austin Stowell), Randy (Caleb Foote), and Lala (Mariel Molino), is scattered around a map, plotting potential transfers to NIS offices in places like Naples and Guantánamo Bay. Enter Michael Franks (Kyle Schmid), who is less than thrilled to see his agents daydreaming when there's a case to solve. To snap them back to reality, he delivers a sharp slap to the back of Gibbs' head—a move that will become legendary.

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Franks then chews out Randy before diving into the case: two sons of a Marine mother were shot and killed for trespassing after being dared to steal wine from a warehouse. The warehouse's owner is a front, leaving the team to untangle the mystery. When Randy cheekily asks Franks to guarantee a transfer to Naples, he nearly earns a slap of his own, but Franks dismisses it, not wanting to make a habit of it. Little does he know, this gesture will become a defining trait for Gibbs.

The finale, titled "Hollywood Ending," sees the team fighting to keep their office open as the government rebrands NIS into NCIS. The stakes are high, and the fate of Franks' ragtag group hangs in the balance. This episode marks a pivotal moment, not just for the head slap's origin, but for the series' direction.

Looking ahead, NCIS: Origins has already been renewed for a third season, but changes are coming. CBS has slashed episode orders for several shows, including this one, as reported in CBS Slashes Episode Orders for Fire Country, NCIS: Origins, and Matlock. The upcoming season will be trimmed to just ten episodes, though it will maintain its case-of-the-week format and deep dives into Gibbs' past. Additionally, co-creator Gina Lucita Monreal will not return for Season 3, signaling a shift behind the scenes.

Fans of the franchise can also look forward to the new spinoff NCIS: New York, which will bring back LL COOL J's Sam Hanna. Meanwhile, the flagship NCIS continues to thrive, with recent episodes like NCIS Season 23 Sneak Peek: Gary Cole's Parker Gets a Heartfelt Visit from Nancy Travis' Harriet keeping audiences engaged.

Don't miss the NCIS: Origins Season 2 finale on May 5 at 9 p.m. ET/PT. Check out the exclusive clip above to see the head slap that started it all.