Editing CSI: Crime Scene Investigation (section)

=== Nielsen ratings ===
{| class="wikitable" style="text-align:center;"
|+ Ratings for ''CSI'' by US broadcast season
|-
!scope="col"| Season {{abbr|no.|number}}
!scope="col"| TV season years
!scope="col"| Episodes
!scope="col"| Timeslot ([[Eastern Time Zone|ET]])
!scope="col"| First aired 
!scope="col"| US viewers (in&nbsp;millions)
!scope="col"| Last aired
!scope="col"| US viewers (in&nbsp;millions)
!scope="col"| Rank
!scope="col"| Average ratings (millions) 
|-
!scope="row"| [[CSI: Crime Scene Investigation season 1|1]]  
|[[2000–01 United States network television schedule|2000–01]]
| 23
|Friday at&nbsp;9pm
|October 6, 2000
|17.3
|May 17, 2001
|18.9
|10
|20.0
|-
!scope="row"| [[CSI: Crime Scene Investigation season 2|2]]
|[[2001–02 United States network television schedule|2001–02]]
| 23
| rowspan="10" |Thursday at&nbsp;9pm 
|September 27, 2001
|22.3
|May 23, 2002 
|27.0
|2
|23.7
|-
!scope="row"| [[CSI: Crime Scene Investigation season 3|3]]
|[[2002–03 United States network television schedule|2002–03]]
| 23
|September 26, 2002
|30.7
|May 15, 2003
|23.8
|1
|26.1
|-
!scope="row"| [[CSI: Crime Scene Investigation season 4|4]]
|[[2003–04 United States network television schedule|2003–04]]
| 23
|September 25, 2003
|26.9
|May 20, 2004
|25.4
| 2
|25.2
|-
!scope="row"| [[CSI: Crime Scene Investigation season 5|5]]
|[[2004–05 United States network television schedule|2004–05]]
|25
|September 23, 2004
|30.5
|May 19, 2005 
|30.7
| 2
|26.2
|-
!scope="row"| [[CSI: Crime Scene Investigation season 6|6]]
|[[2005–06 United States network television schedule|2005–06]]
| 24
|September 22, 2005 
|29.0
|May 18, 2006
|25.4
|3
|24.8
|-
!scope="row"| [[CSI: Crime Scene Investigation season 7|7]] 
|[[2006–07 United States network television schedule|2006–07]]
| 24
|September 21, 2006
|22.5
|May 17, 2007
|20.4
|4
|20.3
|-
!scope="row"| [[CSI: Crime Scene Investigation season 8|8]]
|[[2007–08 United States network television schedule|2007–08]]
|17
|September 27, 2008
|25.2
|May 15, 2009
|18.0
|9
|16.6
|-
!scope="row"| [[CSI: Crime Scene Investigation season 9|9]]
|[[2008–09 United States network television schedule|2008–09]]
|24
|October 9, 2008
|23.4
|May 14, 2009
|14.8
|4
|14.9
|-
!scope="row"| [[CSI: Crime Scene Investigation season 10|10]]
|[[2009–10 United States network television schedule|2009–10]]
|23
|September 21, 2009
|16.0
|May 20, 2010
|14.3
| 12
|14.9
|-
!scope="row"| [[CSI: Crime Scene Investigation season 11|11]]
|[[2010–11 United States network television schedule|2010–11]]
| 22
|September 23, 2010
|14.6
|May 12, 2011
|11.7
| 12
|13.5
|-
!scope="row"| [[CSI: Crime Scene Investigation season 12|12]]
|[[2011–12 United States network television schedule|2011–12]]
| 22
| rowspan="3" |Wednesday at&nbsp;10pm
|September 21, 2011
|12.7
|May 9, 2012
|10.7
|21
|12.4
|-
!scope="row"| [[CSI: Crime Scene Investigation season 13|13]]
|[[2012–13 United States network television schedule|2012–13]]
| 22
|September 26, 2012
|10.7
|May 15, 2013
|9.5
|23
|11.6
|-
!scope="row"| [[CSI: Crime Scene Investigation season 14|14]]
|[[2013–14 United States network television schedule|2013–14]]
| 22
|September 25, 2013
|9.1
|May 7, 2014
|10.0
|18
|11.8
|-
!scope="row"| [[CSI: Crime Scene Investigation season 15|15]]
|[[2014–15 United States network television schedule|2014–15]]
| 18
|Sunday at&nbsp;10:30pm
|September 28, 2014
|9.3
|February 15, 2015
|7.1
|34
|11.1
|}