In a statement regarding his departure, executive producer Steven D Binder said: “As an executive producer and dear friend, Mark continues to be an integral part of the fabric of the show.
“Our north star has always been staying true to our characters, and that truth has always guided the stories we tell and where those characters go.
“So regarding the future of Gibbs, as long-time fans of the show may have noticed over the years…never count Leroy Jethro Gibbs out.”
So while Gibbs and Harmon may be out of the fray, for now, the door has been left wide open should the star want to return.
NCIS season 19 airs Mondays on CBS in the USA. A UK release date is yet to be announced.