- It has been proposed that this page, NCIS, be titled, "NCIS (TV series)".
 Mark Harmon has played the role of Jethro Gibbs since 2003 on NCIS.
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NCIS (Naval Criminal Investigative Service) is a 2003 spin-off of the JAG television series. This show like its parent was created by Donald Bellisario.
The original NCIS franchise is centered on the east coast. Two spin-offs (one centered around Los Angeles and a second around New Orleans) have since been aired.
Actor Mark Harmon in the role of Jethro Gibbs has long been the dominant player on the series.