No, your eyes aren’t fooling you: Mark Harmon and Michael Weatherly are reuniting onscreen for the first time in 10 years on NCIS: Origins. The pair reprise their beloved NCIS roles as Leroy Jethro Gibbs and Tony DiNozzo in the Tuesday, Oct. 20, episode of the NCIS prequel series. NCIS: Origins airs on CBS and streams on Paramount+.
Key facts
- Onscreen reunion: Mark Harmon and Michael Weatherly reunite as Gibbs and DiNozzo for the first time in 10 years
- Series: NCIS: Origins Season 3
- Episode airdate: Tuesday, Oct. 20, 2026
- Time: 10 PM ET/PT
- Network: CBS
- Streaming: Paramount+*
*The new episode can be streamed live on Paramount+ as it airs on CBS via the Paramount+ Premium plan, or it can be streamed on demand starting the next day via any Paramount+ plan.
NCIS: Origins
Watch NowWhen do Mark Harmon and Michael Weatherly reunite on NCIS: Origins?
Mark Harmon and Michael Weatherly reunite onscreen as Gibbs and DiNozzo in the Tuesday, Oct. 20, episode of NCIS: Origins Season 3. The episode, titled “Return of the Mack,” marks their first onscreen reunion in 10 years. NCIS: Origins airs on CBS and streams on Paramount+.
Why are Gibbs and DiNozzo reuniting on NCIS: Origins?
Here’s the story on the Gibbs-DiNozzo reunion on NCIS: Origins: In the episode, “Return of the Mack,” premiering Tuesday, Oct. 20, Gibbs (Mark Harmon) returns to NCIS’ Washington, D.C., headquarters to seek help from a familiar face: Tony DiNozzo (Michael Weatherly), now the agency’s newly appointed director.
An official teaser posted to the NCISverse Instagram account on Oct. 13 shows Gibbs, backpack slung over his shoulder, walking through the empty NCIS offices as memories flood back. “You’re home. And home means family. And whether it’s been 10 minutes or 10 years, when you need them, family’s always there,” Gibbs says in voiceover before knocking on DiNozzo’s door and walking in.
SPOILER ALERT! The Gibbs-DiNozzo reunions follows the events of the NCIS: Origins Season 3 premiere, “Don’t You Forget About Me,” in which Gibbs is shot in the chest outside his remote cabin in Alaska while feeding his dog. Soon afterward, two masked men approach Gibbs, and one checks his pulse. One of the men says, “One down, one to go,” suggesting there is another target.
Gibbs later recovers a fingerprint left by one of the masked men and enlists Woody (Bobby Moynihan), a trusted friend and retired forensic analyst, to help identify it. The discovery connects the present-day mystery to a case from Gibbs’ past.
What roles do Mark Harmon and Michael Weatherly play in NCIS: Origins Season 3?
Mark Harmon plays the older Leroy Jethro Gibbs in NCIS: Origins Season 3. He also narrates and serves as an executive producer on the prequel series. His character’s present-day storyline follows a season-long mystery that ties back to Gibbs’ time at Camp Pendleton in the 1990s.
Michael Weatherly plays Tony DiNozzo, a fan-favorite NCIS character who returned to the flagship NCIS series for a season-long arc in Season 24, and became the new NCIS director.
Harmon and Weatherly’s reunion connects the two series when Gibbs visits NCIS headquarters to seek DiNozzo’s help after being shot in the NCIS: Origins Season 3 premiere.
How to watch the Gibbs and DiNozzo reunion on NCIS: Origins
Watch Mark Harmon and Michael Weatherly reunite as Gibbs and DiNozzo on NCIS: Origins in “Return of the Mack,” the Season 3 episode premiering Tuesday, Oct. 20, and airing on CBS and streaming on Paramount+.
Here’s the watch info you need at a glance:
NCIS: Origins Gibbs and DiNozzo reunion episode
- Episode title: “Return of the Mack” (NCIS: Origins Season 3, Episode 3)
- Premieres: Tuesday, Oct. 20
- Airs: 10 PM ET/PT
- Channel: CBS
- Streaming live: Paramount+ (Paramount+ Premium plan)
- Streaming next day on demand: Paramount+ (Paramount+ Premium plan and Paramount+ Essential plan)
FAQ
When do Gibbs and DiNozzo reunite on NCIS: Origins?
Gibbs and DiNozzo reunite on the NCIS: Origins Season 3 episode airing at 10 PM/ET on Tuesday, Oct. 20, on CBS and Paramount+ (Paramount+ Premium plan). You can stream the episode on demand, starting the next day, with Paramount+ (any plan).
How long has it been since Mark Harmon and Michael Weatherly appeared onscreen together?
It’s been 10 years since Mark Harmon and Michael Weatherly last appeared onscreen together in the NCIS Season 13 finale, “Family First,” which originally aired May 17, 2016. The episode marked Weatherly’s departure from NCIS as a series regular. He returned to the flagship series for a season-long arc in Season 24.
When will Michael Weatherly appear on NCIS: Origins?
Michael Weatherly appears on NCIS: Origins, alongside Mark Harmon, in the Season 3 episode launching Tuesday, Oct. 20, and airing on CBS and streaming on Paramount+. In it, Weatherly will play his iconic NCIS role, Tony DiNozzo. The episode will mark his first appearance on NCIS: Origins.
Where can I watch NCIS: Origins Season 3?
You can watch new episodes of NCIS: Origins Season 3 on Tuesdays at 10 PM ET/PT on CBS. Episodes are also available to stream on Paramount+.
Is Mark Harmon in every episode of NCIS: Origins Season 3?
Yes. In addition to narrating the series, Mark Harmon appears in all 10 episodes of NCIS: Origins Season 3 as part of a season-long, present-day mystery tied to his 1990s Camp Pendleton days.
