Archive · 29 Oct 2025
Mark Harmon to Guest Star on NCIS Crossover Event
A favorite character from the TV show NCIS, named Jethro Gibbs, is coming back to visit!
Mark Harmon, the actor who played Gibbs for a long time, will appear in a special episode.
This episode will be part of a crossover, which means two shows, NCIS and a new show called NCIS: Origins, will connect.
NCIS: Origins is about a younger Gibbs in the past.
In the crossover, the younger Gibbs will investigate a case from the 1990s.
Then, the older Gibbs, played by Mark Harmon, will reappear to help solve the same case in the present day.
Mark Harmon is also a producer for these shows and said he's excited to show fans what Gibbs is up to now.
The shows will air back-to-back on November 11th.
It's a chance for fans to see their favorite character again after he left the agency.
Mark Harmon will return as Leroy Jethro Gibbs in a crossover event on November 11.
The crossover will connect the shows NCIS and NCIS: Origins.
The event will feature a '90s-set case on NCIS: Origins that is reopened in the present day on NCIS.
Harmon, who is an executive producer on both series, last appeared as Gibbs in 2021.
NCIS: Origins follows a young Gibbs in the early '90s and is narrated by Harmon.
- Who
- Mark Harmon as Leroy Jethro Gibbs
- What
- Reprising his role for a crossover event between NCIS and NCIS: Origins.
- When
- November 11
- Where
- CBS
- Why
- To reconnect fans with the character and explore a case that spans decades.
- Date of Crossover
- November 11
- Network
- CBS
- Returning Character
- Leroy Jethro Gibbs
- Actor Returning as Gibbs
- Mark Harmon
- NCIS: Origins Timeslot
- 8 PM ET
- NCIS Timeslot
- 9 PM ET