1. sezona
2003 • 23 Episodes
Season 1 of NCIS: izmeklēšanas dienests premiered on septembris 23, 2003.
2. sezona
2004 • 23 Episodes
Season 2 of NCIS: izmeklēšanas dienests premiered on septembris 28, 2004.
3. sezona
2005 • 24 Episodes
Season 3 of NCIS: izmeklēšanas dienests premiered on septembris 20, 2005.
4. sezona
2006 • 24 Episodes
Season 4 of NCIS: izmeklēšanas dienests premiered on septembris 19, 2006.
5. sezona
2007 • 19 Episodes
Season 5 of NCIS: izmeklēšanas dienests premiered on septembris 25, 2007.
6. sezona
2008 • 25 Episodes
Season 6 of NCIS: izmeklēšanas dienests premiered on septembris 23, 2008.
7. sezona
2009 • 24 Episodes
Season 7 of NCIS: izmeklēšanas dienests premiered on septembris 22, 2009.
8. sezona
2010 • 24 Episodes
Season 8 of NCIS: izmeklēšanas dienests premiered on septembris 21, 2010.
9. sezona
2011 • 24 Episodes
Season 9 of NCIS: izmeklēšanas dienests premiered on septembris 20, 2011.
10. sezona
2012 • 24 Episodes
Season 10 of NCIS: izmeklēšanas dienests premiered on septembris 25, 2012.
11. sezona
2013 • 24 Episodes
Season 11 of NCIS: izmeklēšanas dienests premiered on septembris 24, 2013.
12. sezona
2014 • 24 Episodes
Season 12 of NCIS: izmeklēšanas dienests premiered on septembris 23, 2014.
13. sezona
2015 • 24 Episodes
Season 13 of NCIS: izmeklēšanas dienests premiered on septembris 22, 2015.
14. sezona
2016 • 24 Episodes
Season 14 of NCIS: izmeklēšanas dienests premiered on septembris 20, 2016.
15. sezona
2017 • 24 Episodes
Season 15 of NCIS: izmeklēšanas dienests premiered on septembris 26, 2017.
16. sezona
2018 • 24 Episodes
Season 16 of NCIS: izmeklēšanas dienests premiered on septembris 25, 2018.
17. sezona
2019 • 20 Episodes
Season 17 of NCIS: izmeklēšanas dienests premiered on septembris 24, 2019.
18. sezona
2020 • 16 Episodes
Season 18 of NCIS: izmeklēšanas dienests premiered on novembris 17, 2020.
19. sezona
2021 • 21 Episodes
Season 19 of NCIS: izmeklēšanas dienests premiered on septembris 20, 2021.
20. sezona
2022 • 22 Episodes
Season 20 of NCIS: izmeklēšanas dienests premiered on septembris 19, 2022.
21. sezona
2024 • 10 Episodes
Season 21 of NCIS: izmeklēšanas dienests premiered on februāris 12, 2024.