Season 0 of NCIS premiered on April 22, 2003.

Season 1 of NCIS premiered on September 23, 2003.

Season 2 of NCIS premiered on September 28, 2004.

Season 3 of NCIS premiered on September 20, 2005.

Season 4 of NCIS premiered on September 19, 2006.

Season 5 of NCIS premiered on September 25, 2007.

Season 6 of NCIS premiered on September 23, 2008.

Season 7 of NCIS premiered on September 22, 2009.

Season 8 of NCIS premiered on September 21, 2010.

Season 9 of NCIS premiered on September 20, 2011.

Season 10 of NCIS premiered on September 25, 2012.

Despite a bomb attack on Gibbs and the team, duty continues to call for these special agents as they try to regroup and put the pieces back together.

Season 11 of NCIS premiered on September 24, 2013.

When Season 10 ended in the series' biggest cliffhanger, the NCIS was virtually disbanded and Gibbs was aiming a rifle at the FBI agent responsible.

Season 12 of NCIS premiered on September 23, 2014.

In Season 12, Gibbs and McGee travel to Russia to retrieve a computer expert and get into an ongoing battle with mercenary Sergei Mishnev.

Season 13 of NCIS premiered on September 22, 2015.

Season 14 of NCIS premiered on September 20, 2016.

Following the unexpected departure of a key member, the NCIS team regroups and recruits several new faces, including a former MI6 operative.

Season 15 of NCIS premiered on September 26, 2017.

Season 16 of NCIS premiered on September 25, 2018.

Season 17 of NCIS premiered on September 24, 2019.

Season 18 of NCIS premiered on November 17, 2020.

Season 19 of NCIS premiered on September 20, 2021.

Season 20 of NCIS premiered on September 19, 2022.

Season 21 of NCIS premiered on February 11, 2024.

Season 22 of NCIS premiered on October 13, 2024.