Mark Harmon and Michael Weatherly Set ‘NCIS’ Reunion

Mark Harmon and Michael Weatherly are returning to the same NCIS story for the first time in a decade. Their characters, Leroy Jethro Gibbs and Tony DiNozzo, will reunite in the October 20 episode of NCIS: Origins, giving the prequel a major present-day crossover.

The episode brings Gibbs back to the agency’s Washington, D.C., headquarters after he was shot by unknown attackers in the Season 3 premiere. He needs help from DiNozzo, who has moved from his former field-agent role into the job of NCIS director. CBS has positioned the meeting as part of the mystery that pulls Gibbs out of retirement.

Two franchise returns finally intersect

Harmon left the original NCIS as a regular in 2021 after playing Gibbs for 19 seasons. He remained connected to the franchise as narrator and executive producer of Origins, which follows Austin Stowell’s younger version of Gibbs at Camp Pendleton in the early 1990s. Season 3 has now brought Harmon onscreen for a storyline linking present-day danger to that earlier chapter.

Weatherly played DiNozzo for 13 seasons before departing in 2016. He later returned in the Paramount+ series NCIS: Tony & Ziva, and his new season-long arc on the original show began with the October 6 Season 24 premiere. The October 20 crossover allows those separate comebacks to meet rather than treating them as isolated nostalgia.

A reunion built into the current plot

The setup matters because Gibbs and DiNozzo are not simply appearing for a commemorative scene. Gibbs’s shooting and the identity of the assailants provide an active case, while DiNozzo’s leadership position changes the balance between the former colleagues. Their reunion can advance the season’s mystery while acknowledging the partnership that helped define the flagship series.

NCIS: Origins airs Tuesdays at 10 p.m. ET/PT on CBS and streams on Paramount+. The reunion arrives on October 20, two weeks after Weatherly’s return to the main series, making it a coordinated franchise event across the current timelines rather than a standalone cameo.