Character timeline of the television show NCIS. NCIS is an American crime drama TV series, about a fictitious team of special agents from the Naval Criminal Investigative Service, which manages criminal inquiries involving the US Navy and Marine Corps. The idea and characters were at first introduced in two episodes of the CBS series JAG (season eight episodes "Ice Queen" and "Meltdown"). The televison show, a sequel from JAG, opened on September 23, 2003, on CBS. To date it has aired for ten full seasons and has entered into syndicated reruns. Donald P. Bellisario is co-creator, along with Don McGill, as well as executive producer.
