2022---mark-harmon--what-has-become-of-the-millionaire-actor-since-leaving-ncis- May 2026

In November 2023, he released his first book, Ghosts of Honolulu: A Japanese Spy, a Japanese American Spy Hunter, and the Untold Story of Pearl Harbor , co-authored with former NCIS technical advisor Leon Carroll Jr..

As of 2022 and beyond, Harmon remains a major player in Hollywood, with an estimated net worth of . 🎬 Recent Projects and Career Shifts In November 2023, he released his first book,

He made a brief on-screen appearance in the NCIS: Origins pilot and returned for a special Veterans Day crossover event in November 2025. 🏠 Personal Life and Wealth Mark Harmon Net Worth In November 2023