NCIS: Los Angeles (Naval Criminal Investigative Service: Los Angeles) is an American television series combining elements of the military drama and police procedural genres, which premiered on the CBS network on September 22, 2009. The series airs following NCIS on Tuesdays in the United States.
NCIS: Los Angeles is the first spin-off of the successful show NCIS, itself a spinoff of another CBS series, JAG. On October 7, 2009, CBS gave the series a full-season pickup, extending the first season to 22 episodes. The season was extended again on November 4, 2009, when CBS announced its order for an additional two episodes.
The second season began airing on September 21, 2010. On May 18, 2011, CBS renewed the series for a third season.