Adam Campbell is crossing over to NCIS : Origins .

The NCIS vet, who has appeared on the mothership in flashbacks as a young Donald “Ducky” Mallard, will reprise his role in a Season 2 episode that will serve as a special tribute to the late David McCallum . Related Stories

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“We wanted to do this episode to honor the memory of our dear friend David McCallum,” NCIS: Origins co-showrunners Gina Lucita Monreal and David J. North said in a joint statement. “He was a beloved member of the NCIS family for so many years and we’re incredibly lucky

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