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Mark Harmon Returns, Narrates Every NCIS: Origins S3

7/1/2026

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Summary

Story summary

Mark Harmon returns as Leroy Jethro Gibbs, appears on-screen in every NCIS: Origins Season 3 episode, narrates each episode and serves as executive producer with Sean Harmon and others.
Season 3, a ten-episode mystery tied to Gibbs’s 1990s Camp Pendleton past, premieres in the fall and airs Tuesdays at 10 p.m. ET/PT on CBS and Paramount+.
The series follows young Gibbs, played by Austin Stowell, and co-stars Kyle Schmid, Mariel Molino and others.

History

Historical Context

After the 1991 Tailhook scandal forced the Navy to replace the Naval Investigative Service, President George H.W. Bush signed 1992 legislation creating the civilian-run Naval Criminal Investigative Service with a $1.5 billion budget and 200 agents. NCIS: Origins Season 3 dramatizes those early Camp Pendleton cases, linking the show’s plot to the agency’s formative restructuring.

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Story summary

Mark Harmon returns as Leroy Jethro Gibbs, appears on-screen in every NCIS: Origins Season 3 episode, narrates each episode and serves as executive producer with Sean Harmon and others.
Season 3, a ten-episode mystery tied to Gibbs’s 1990s Camp Pendleton past, premieres in the fall and airs Tuesdays at 10 p.m. ET/PT on CBS and Paramount+.
The series follows young Gibbs, played by Austin Stowell, and co-stars Kyle Schmid, Mariel Molino and others.

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