Fans of NCIS were left in shock as longtime star Mark Harmon shared heartbreaking news regarding his close friend and co-star Brian Dietzen.

According to Harmon, Dietzen recently faced a deeply personal loss within his family, prompting an outpouring of support from the NCIS cast and crew. Harmon spoke with emotion, praising Dietzen’s strength and resilience during what he described as an “unimaginably difficult time.” While the details have been kept private out of respect for the family, Harmon’s words made it clear that this moment has deeply affected those close to the actor.

Fans have rallied behind Dietzen, flooding social media with kind messages, prayers, and unwavering support — proving once again that the NCIS family, both on and off screen, stands together through everything.