What role did Mark Harmon play in NCIS?

Mark Harmon played the iconic character of Leroy Jethro Gibbs on the NCIS series for 18 seasons.

When is the NCIS and NCIS: Origins crossover event airing?

The crossover event is set to air on Veterans Day, November 11.

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Veteran Actor Mark Harmon Reprises Iconic Gibbs Role

Q: What is the plot of the NCIS and NCIS: Origins crossover?

The crossover will see the younger Gibbs, played by Austin Stowell, and his team investigating the small-town death of a naval officer in the 1990s on NCIS: Origins, with the case unexpectedly reopened in the present day on NCIS.

28 Oct

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Summary

Mark Harmon, who played Gibbs for 18 seasons, returns for NCIS and Origins crossover
Crossover event airs on Veterans Day, with Gibbs investigating a 1990s naval officer death
Harmon has remained involved as executive producer and narrator of Origins

Veteran Actor Mark Harmon Reprises Iconic Gibbs Role

In a highly anticipated move, veteran actor Mark Harmon is set to reprise his iconic role as Leroy Jethro Gibbs in the upcoming crossover event between the hit CBS series NCIS and its prequel, NCIS: Origins. The 74-year-old actor, who portrayed Gibbs for 18 seasons before exiting the show in 2021, will make his first on-camera appearance since a cameo in the Origins debut in 2024.

The crossover, airing on Veterans Day, will see the younger Gibbs, played by Austin Stowell, and his team investigating the small-town death of a naval officer in the 1990s on NCIS: Origins. This decades-spanning mystery will unexpectedly be reopened in the present day on the main NCIS series. The special event will mark the first time the two shows have crossed over, with the air order switching for one night only.