NCIS is an American crime drama drama television series, rotating around a fictitious team of special agents from the Naval Criminal Investigative Service, which manages criminal probes focusing on the U.S. Navy and Marine Corps.
The concept and roles were initially introduced in two episodes of the CBS series JAG (season eight episodes “Ice Queen” and “Meltdown”). The program, a spin-off from JAG, premiered on September 23, 2003, on CBS. To date it has aired for ten full seasons and has gone into syndicated reruns. Donald P. Bellisario is co-creator, together with Don McGill, as well as executive producer.