- 18 Seasons
In the crime thriller series NCIS, a team of US Navy crime scene investigators uses their technical skills to identify and track down criminals. The teams is led by a no-nonsense-tough-guy boss. His crew is made up of lovably quirky characters with improbable skills. This series follows the well established formula of the modern crime-procedural drama, in which a team of investigative professionals works together to solve murders based on evidence left behind at the crime scene. Each team member has unique skills, and all their skills mesh to get the job. The drama of the series revolves around both the crime and the interaction of the team members. While far from realistic, the series has been compelling enough to draw huge audiences and spawn numerous spinoffs. This version is the original. It began airing in 2003 and had run for 17 seasons as of 2020. An eighteenth season is planned for 2021. The series' longevity makes it the second longest running current scripted drama series after Law and Order: Special Victims Unit. The first spin off debuted after the parent series' sixth season. The second spin off debuted after the parent series' eleventh season. The series' creator, Donald P. Bellisario, left the show as showrunner in 2007 after a publicized clash with star Mark Harmon. Bellisario remained in the credits as executive producer, but a new showrunning team was brought in to appease Harmon. The series' peak rating were turned in in 2012, but it remains popular.