Mark Harmon is one of those actors whose character might just be more famous than the actor himself. Harmon got the role of a lifetime as Leroy Jethro Gibbs on NCIS, and has acted in that capacity for a whopping 18 seasons.
However, in 2021 it was finally time to part ways with his character. Following months of speculations over his potential exit from the show, Harmon has confirmed he will be leaving.
According to executive producer and showrunner Steven D. Binder, however, he might return sometime in the future.