Season 1

Season 1 of NCIS premiered on September 23, 2003

Season 2

Season 2 of NCIS premiered on September 28, 2004

Season 3

Season 3 of NCIS premiered on September 20, 2005

Season 4

Season 4 of NCIS premiered on September 19, 2006

Season 5

Season 5 of NCIS premiered on September 25, 2007

Season 6

Season 6 of NCIS premiered on September 23, 2008

Season 7

Season 7 of NCIS premiered on September 21, 2009

Season 8

Season 8 of NCIS premiered on September 20, 2010

Season 9

Season 9 of NCIS premiered on September 19, 2011

Season 10

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

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

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

Season 13 of NCIS premiered on September 21, 2015

Season 14

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

Season 15 of NCIS premiered on September 26, 2017

Season 16

Season 16 of NCIS premiered on September 24, 2018

Season 17

Season 17 of NCIS premiered on September 23, 2019

Season 18

Season 18 of NCIS premiered on November 17, 2020

Season 19

Season 19 of NCIS premiered on September 19, 2021

Season 20

Season 20 of NCIS premiered on September 18, 2022

Season 21

Season 21 of NCIS premiered on February 11, 2024

Season 22

Season 22 of NCIS premiered on October 14, 2024

Season 23

Season 23 of NCIS premiered on October 14, 2025