Mark Harmon's son, Sean, portrayed a younger version of his father's "NCIS" character several times, so why didn't he reprise ...

with the arrival of NCIS: Origins, fans will get the chance to explore the early days of Agent Gibbs. Sean Harmon, the son of the renowned Mark Harmon, took on the role of young Gibbs in seven ...

His son (Sean Harmon) is also attached to the show. Provided NCIS and NCIS: Hawai’i get renewed, Actor Mark Harom appeared on the latest episode of The View. When asked how he had been ...