6don MSN
"NCIS" at 500: Cracking the code
The CBS procedural, now in its 23rd season, is marking its 500th episode tracking agents of the Naval Criminal Investigative Service. But the story of how the series became the world's most-watched TV ...
Mark Harmon's son, Sean, portrayed a younger version of his father's "NCIS" character several times, so why didn't he reprise the role for "NCIS: Origins"?
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