Will Mark Harmon return to NCIS in 2024? Here’s what Gibbs fans need to know

“NCIS” fans have already spent some time with young Gibbs through flashbacks. The most notable example comes from the Season 18 episode “Everything Starts Somewhere,” which reveals how he and acting coroner Donald “Ducky” Mallard (Adam Campbell) met decades before the events of “NCIS.” In this and several other episodes, young Gibbs will be portrayed by none other than Mark Harmon’s real-life son Sean, who will contribute to “NCIS: Origins” behind the camera.

Alongside his father, Sean will serve as an executive producer on the upcoming prequel series, and he seems eager to do so. “I always felt there was a story worth telling about his earlier years, so I’m thrilled to be taking on a role as producer alongside him.” [writers Gina Lucita Monreal and David J. North] and my father as we tell this story and reveal a new side to this beloved character,” he said when “NCIS: Origins” was announced in January. Sean Harmon also referenced the importance of the Gibbs character to him personally, having seen his father develop it over the years and try it out himself (via Variety)

“NCIS: Origins,” the latest addition to the ever-expanding “NCIS” timeline and the platform for Mark Harmon’s big return to the franchise, is scheduled to release sometime in 2024.