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NCIS is a CBS network show about a team of special agents from the Naval Criminal Investigative Service of the United States Navy and United States Marine Corps. The concept and characters... More

NCIS is a CBS network show about a team of special agents from the Naval Criminal Investigative Service of the United States Navy and United States Marine Corps. The concept and characters were initially introduced in a two-part episode of the CBS series JAG (episodes 8.20 and 8.21). The show premiered on September 23, 2003. Its executive producer is Donald Bellisario.