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

Contrary to rumors of retirement, Harmon has clarified that he simply "pushed away" from the grueling 22-hour-day schedule of a series lead to focus on fresh challenges.

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.. Contrary to rumors of retirement, Harmon has clarified

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 Contrary to rumors of retirement

Harmon reprised his role as Ryan Coleman in the Disney sequel Freakier Friday (2025), reuniting with Jamie Lee Curtis and Lindsay Lohan. he released his first book