2001 | 11 Episodes

Season 1 of NightWash premiered on October 14, 2001.

2002 | 23 Episodes

Season 2 of NightWash premiered on January 6, 2002.

2003 | 25 Episodes

Season 3 of NightWash premiered on March 30, 2003.

2004 | 24 Episodes

Season 4 of NightWash premiered on January 6, 2004.

2005 | 27 Episodes

Season 5 of NightWash premiered on January 2, 2005.

2006 | 18 Episodes

Season 6 of NightWash premiered on March 19, 2006.

2009 | 6 Episodes

Season 7 of NightWash premiered on November 5, 2009.

2010 | 18 Episodes

Season 8 of NightWash premiered on February 18, 2010.

2011 | 17 Episodes

Season 9 of NightWash premiered on January 6, 2011.

2012 | 15 Episodes

Season 10 of NightWash premiered on January 5, 2012.

2013 | 8 Episodes

Season 11 of NightWash premiered on January 10, 2013.

2014 | 14 Episodes

Season 12 of NightWash premiered on March 6, 2014.

2016 | 15 Episodes

Season 13 of NightWash premiered on January 7, 2016.

2017 | 17 Episodes

Season 14 of NightWash premiered on March 2, 2017.

2019 | 8 Episodes

Season 15 of NightWash premiered on September 13, 2019.