The legendary procedural NCIS has been a television staple for more than 20 seasons thus far, but will the flagship series be renewed for season 23? Debuting in 2003 (as a spinoff of JAG), NCIS follows the special agents of the U.S. Navy’s Naval Crime Investigative Service, as they are faced with the most compelling cases that the military can throw at them. Anchored for most of its run by Mark Harmon as Supervisory Special Agent Jethro Gibbs (played by Mark Harmon), the series has followed in the footsteps of other long-running procedurals by showcasing an ability to change.
