Adam Campbell's "NCIS" character, who has appeared on the mothership in flashbacks as the young version of David McCallum's Ducky, is sent to work with our "Origins" team to see if they need an in-house medical examiner. But the crew at Pendleton is skeptical of his true motives.

David J. North: “It's not like any piece of wardrobe. It's definitely cherished, but they shoot the original NCIS up in Valencia, California, and we reached out to them and asked for the hat, and that's how that's how we had it. But yeah, it was a really cool thing and Adam was so excited.”

“He always had a way of knowing who I was meant to be.” So says Mark Harmon in the emotional voiceover that caps off the NCIS: Origins serving as a tribute to the late David McCallum, with Adam Campbell reprising his role as the young Ducky.

Just like NCIS did in Season 21, the prequel Origins will be paying tribute to the late David McCallum, who played Dr. Donald “Ducky” Mallard on the mothership and died in 2023. Adam Campbell will reprise his role as young Ducky in NCIS: Origins ...

Campbell previously guest-starred in four episodes of "NCIS" as Young Ducky. His first appearance came in Season 12, Episode 3 ("So It Goes"), while his most recent encore came in Season 18, Episode 2 ("Everything Starts Somewhere"), which predated McCallum's death by three years.