In lieu of Mark Harmon exiting "NCIS," TV Insider sought out what Harmon's co-stars have said about working with him over the years — and, naturally, they all have good things to say. To start with, David McCallum, who plays Dr. Donald "Ducky" Mallard, credited Harmon with creating a productive working environment. McCallum said in 2007, "There was always a certain degree of chaos [at one point during the series' production], but it's all gone now. Mark was instrumental in putting our house in order — I really thank him for that."
Around the same time, in 2009, co-star Michael Weatherly, who played Senior Field Agent Anthony DiNozzo through Season 13, complimented Harmon's on-set behavior, saying, "[Harmon is] a very rare person in this business because there's no assistant, no entourage. Mark is largely just a very straightforward, approachable, calm, assertive guy. He's not a people pleaser." More recently, in 2019, Cote de Pablo, who joined in Season 3 as Special Agent Ziva David, said of Harmon, "We were always trying to infuse [scenes] with different things, try something new. Mark has been here for years, and he's still bringing it."
Further, even those closest to Harmon recognize his impressive professionalism. Harmon's real-life wife Pam Dawber, who played Marcie Warren in later seasons, raved about Harmon in 2021, saying, "Mark is for the best of everybody and everything. His ego does not extend. He just wants it all to work."
We'll definitely all miss Harmon's on-screen presence in "NCIS" — just as his co-stars will miss his off-screen presence.
