The Speculation Surrounding Mark Harmon's Return

Despite Rumors, Neither Mark nor Cbs Has Officially Confirmed Whether the Actor Will Make a Comeback to Ncis. However, His Former Co-Stars, Including Rocky Carroll and Sean Murray, Have Hinted at the Possibility of Seeing Gibbs Again. Showrunner Steven D. Binder and Former Cbs President Kelly Kahl Also Expressed a Strong Attachment to Mark's Character, Leaving the Door Open for a Potential Reappearance.

Mark Harmon's New Book Unveiled

Scheduled for Release on November 14, Mark Harmon's Upcoming Book, Titled "Ghosts of Honolulu: a Japanese Spy, a Japanese American Spy Hunter, and the Untold Story of Pearl Harbor," Delves into the History of Naval Intelligence During World War Two. the Book Portrays the Intriguing Tale of Japanese-American Agent Douglas Wada and Japanese Spy Takeo Yoshikawa, Engaged in High-Stakes Intelligence Warfare Before the Attack on Pearl Harbor. Harmon Expressed His Dedication to Unveiling the History and Stories That Influenced the Creation of Ncis, Shedding Light on the Often-Hidden Lives of Public Servants Working at the Highest Level.

Ncis: Is Mark Harmon Planning to Reprise His Iconic Role as Leroy Jethro Gibbs? Here's Everything We Know

By Sarah Jenkins

• Oct 8, 2026 • 2 min read

Ncis: Is Mark Harmon Planning to Reprise His Iconic Role as Leroy Jethro Gibbs? Here's Everything We Know

Direct Answer • Key Takeaway

Mark Harmon, Renowned for His Portrayal of Agent Leroy Gibbs in Ncis for 19 Seasons, Recently Delighted Fans with News of a Non-Fiction Novel Inspired by the Show. Partnering with Former Special Agent Leon Carroll Jr. , the 71-Year-Old Actor Is Working on a Book Centered Around the Office of Naval Intelligence, the Predecessor of Ncis. While Rumors Circulate About a Possible Comeback to the Long-Running Cbs Drama, Details Regarding Mark's Return Remain Uncertain. Nevertheless, His Former Cast Members and Network Executives Have Expressed a Desire to See Gibbs on-Screen Again.

Sarah Jenkins

Senior Technology Editor & AI Specialist

Sarah Jenkins is a veteran tech journalist with over 12 years of experience covering artificial intelligence, mobile innovations, and digital ethics. Her insights have appeared in leading technology publications worldwide.

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