Harmon will return in the flesh for a special crossover event on Tuesday, Nov. 11. For one night only, “NCIS” and “NCIS: Origins” are swapping time slots; the spinoff will air first at 8 p.m. ET, followed by the original series.

Gibbs (Austin Stowell) and Ducky Mallard (Adam Campbell) already have a personal history together, which is why Ducky's called in as a liaison between Gibbs' people at Camp Pendleton and the D.C. NCIS office — and also why Ducky gifts Gibbs upon their parting with a special object that they both admired while out on the town together: a boat in a glass bottle.

For McGee, entrepreneurship might be his version of peace — a new path that still honors his legacy without killing off his character or undermining his growth. Murray’s portrayal of McGee has been one of NCIS’s defining constants.

This procedural drama, centered around a team of special agents at the Naval Criminal Investigative Service in Washington, D.C., has seen numerous cast changes over its long run. In this article, we will explore the journeys of the original cast members and where their careers have taken them since leaving the show.

Adam Campbell felt anxious while stepping into David McCallum’s iconic role as Ducky in the episode that pays tribute to the late actor on NCIS: Origins season 2