For years, Mark Harmon has been one of television’s most enduring and private stars, especially during his long-running role as Leroy Jethro Gibbs on NCIS. Behind the scenes, however, rumors occasionally circulated about his health, particularly after fans noticed a change in his appearance, such as weight loss and a more reserved presence on the show. While Harmon never publicly addressed these changes in detail, speculation grew that he might be dealing with a medical issue he preferred to keep under wraps.

According to some close to the production, Harmon did experience health challenges that contributed to his decision to reduce his screen time in later seasons. While he reportedly wanted to continue working, he also understood the importance of stepping back and taking care of himself. Known for being fiercely private, he didn’t want sympathy or public attention drawn to any personal struggles. Instead, he chose to quietly prioritize his well-being, allowing the character of Gibbs to exit the storyline in a respectful, understated way.

Now, as more time has passed since his departure from the show, it’s become clearer that Harmon’s decision was about maintaining his health and preserving his legacy. Though he never made a dramatic announcement or revealed specifics, those close to him have said he’s doing well and enjoying a quieter life away from the intense demands of network television. His story is a reminder that even our strongest on-screen heroes sometimes face private battles—and that it’s okay to step away when it’s time.