CBS's prequel drama NCIS: Origins is bringing together three major vets of the flagship franchise this October, staging a historic on-screen reunion for Mark Harmon and Michael Weatherly alongside a multi-episode return for Emily Wickersham. The appearances take place within a special present-day storyline running parallel to the prequel's 1990s narrative during its third season. Following Harmon and Weatherly sharing the screen on Tuesday, October 20, for the first time in 10 years, Wickersham is scheduled to make her series debut on Tuesday, October 27, at 10 p.m. ET on CBS.

While NCIS: Origins primarily follows a young Leroy Jethro Gibbs—played by Austin Stowell—during his early days at Camp Pendleton in the 1990s, Season 3 has expanded its scope. Harmon, who serves as an executive producer and series narrator, is appearing on-screen across all episodes of the current season in a 2026 timeline, according to Variety. After an older Gibbs is shot by unknown assailants in the season premiere, his investigation into who wants him dead pulls him back to Washington, D.C., directly into the orbit of his former team members.

Gibbs and DiNozzo Reunite After a Decade

The first major crossover occurred in Season 3, Episode 3, titled "Return of the Mack," which aired October 20 on CBS and streams on Paramount+. The episode marked the first time Harmon and Weatherly appeared together as Leroy Jethro Gibbs and Anthony "Tony" DiNozzo since the Season 13 finale of NCIS a decade ago, when DiNozzo departed the agency after 13 seasons.

Weatherly recently rejoined the flagship NCIS cast for its 24th season, which premiered on October 6, stepping into the role of the agency's new director. According to Deadline, showrunner and executive producer David J. North explained that the reunion was built out of narrative necessity for Gibbs' season-long arc. After a colleague named Woody—played by Bobby Moynihan in the October 13 episode—helped Gibbs reconstruct a fingerprint pulled from his neck, they discovered the suspect's profile was buried in bureaucratic red tape. Needing someone with high-level clearance, Gibbs turned to the newly appointed Director DiNozzo.

In "Return of the Mack," the two characters catch up over a bottle of bourbon in the director's office and pause to remember the late Director Leon Vance (Rocky Carroll) and late medical examiner Dr. Donald "Ducky" Mallard (David McCallum), according to TV Insider. Although DiNozzo urges Gibbs to let chief medical examiner Jimmy Palmer (Brian Dietzen) examine his gunshot wound, Gibbs refuses in order to maintain the illusion that he is dead. By the end of the hour, DiNozzo provides Gibbs with a file showing the fingerprint belongs to a tracker who worked for the CIA—likely hired by the real shooter to locate Gibbs—and reveals that the NCIS computer system was hacked weeks earlier by someone accessing personnel files from the 1990s.

Emily Wickersham's Multi-Episode Return as Ellie Bishop

Because Gibbs insists on keeping his investigation off the official radar, DiNozzo recruits someone operating outside standard agency channels: former Special Agent Eleanor "Ellie" Bishop, played by Emily Wickersham. According to Yahoo Entertainment, Wickersham will appear in multiple episodes of NCIS: Origins this season, beginning with the October 27 installment, "Shimmy Shimmy Ya."

Wickersham was a main cast member on the original NCIS for eight seasons before her character departed to become an undercover operative. Note that sources vary regarding the year of her original departure: Yahoo Entertainment states she left the flagship series in 2018, while Deadline reports she exited in 2021. Prior to joining the prequel, Wickersham made a guest appearance on the flagship NCIS in March, briefly reuniting with Nick Torres (Wilmer Valderrama) before disappearing back into the field.

In a sneak peek released by CBS for "Shimmy Shimmy Ya," Gibbs returns to a familiar location and holds a gun on an approaching figure, who turns out to be Bishop. When Gibbs reminds her that he told DiNozzo the investigation needed to stay off the books, Bishop replies, "Yeah, well, that's why he called me. My whole life is off the books." The preview concludes with Gibbs telling his former agent to "gear up," prompting Bishop to note she never thought she would hear him say that again.

Dual Timelines and Ratings Momentum

The integration of legacy cast members in the 2026 timeline is designed to complement the ongoing 1990s prequel narrative. In "Return of the Mack," the 1992 storyline featured Stowell's young Gibbs going undercover as a gigolo alongside Adam Campbell's young Ducky to solve a murder for Mike Franks' (Kyle Schmid) team, while navigating personal tension with Special Agent Lala Dominguez (Mariel Molino). In the upcoming October 27 episode, the prequel timeline moves to 1993, following the Camp Pendleton team as they intervene when a general's rebellious teenage son is targeted by a former gang member.

The creative strategy of blending past and present timelines has coincided with strong viewership growth for CBS. According to data from CBS reported by Variety, the NCIS: Origins Season 3 premiere on October 6 averaged 4.39 million viewers. That figure represents a 20% increase over the prior year's premiere and positioned the drama as the No. 1 broadcast program in its Tuesday 10 p.m. ET time slot.

Produced by CBS Studios, NCIS: Origins also stars Tyla Abercrumbie, Diany Rodriguez, and Caleb Foote, with North, Mark Harmon, Sean Harmon, Michele Greco, and Eric Christian Olsen serving as executive producers.

Frequently Asked Questions

How many episodes will include Emily Wickersham's Ellie Bishop?

CBS and series producers have confirmed that Wickersham is booked for a multi-episode arc beginning on October 27 in "Shimmy Shimmy Ya," as reported by Entertainment Weekly. However, the network has not disclosed the exact number of episodes she will appear in or whether her involvement will extend beyond Gibbs' current investigation.

Will other legacy NCIS characters appear in the present-day storyline?

According to Entertainment Weekly, showrunner David J. North noted that legacy returns are dictated by what the present-day story requires and whom Gibbs would logically call for help. While this approach leaves the door open for additional franchise alumni to appear during Harmon's season-long arc, no other specific guest returns have been confirmed at this time.

How do the present-day investigation and the 1990s story connect?

The two timelines are directly linked by the central mystery of Season 3. The assailant who shot Gibbs in 2026 is tied to his early days at Camp Pendleton, underscored by DiNozzo's discovery that a hacker recently breached NCIS servers to access agency personnel files from the 1990s.

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