Success on television doesn’t come bigger than NCIS. The franchise was conceived by Donald Paul Bellisario, a former sergeant in the U.S. Marine Corps who had previously found success with the original Magnum P.I., starring Tom Selleck. JAG was the first show in the franchise, followed by NCIS. Since then, there have been five babies, namely : NCIS: Los Angeles, NCIS: New Orleans, NCIS: Hawaiʻi, NCIS: Sydney, and NCIS: Origins.