'NCIS: Origins' Sets David McCallum Tribute Episode With Adam Campbell Returning as Young Ducky

"NCIS: Origins" is planning a big tribute episode for the late David McCallum's Ducky in Season 2. The CBS prequel series has tapped actor Adam Campbell to reprise his role as the young Dr. Donald "Ducky" Mallard for an episode airing this fall honoring McCallum's fan-favorite character, a fixture on the flagship "NCIS" for 20 seasons. The episode, titled "The Edge," follows as Ducky is sent to Camp Pendleton to shadow the team while they work a case, which leads to a reunion with Gibbs (Austin Stowell) after the duo crossed paths earlier. As the episode title hints, the . . .