Nielsen Ratings
| Season | Network | Timeslot | Season premiere | Season finale | Rank | Viewers (mill) |
|---|---|---|---|---|---|---|
| 1 | The WB | Tuesday 9:00 pm | September 13, 2005 | May 4, 2006 | #165 | 3.81 |
| Thursday 9:00 pm | ||||||
| 2 | The CW | Thursday 9:00 pm | September 28, 2006 | May 17, 2007 | #216 | 3.14 |
| 3 | October 4, 2007 | May 15, 2008 | #187 | 2.74 | ||
| 4 | September 18, 2008 | May 14, 2009 | #161 | 3.14 | ||
| 5 | September 10, 2009 | May 13, 2010 | #125 | 2.64 | ||
| 6 | Friday 9:00 pm | September 24, 2010 | May 20, 2011 | #209 | 2.42 | |
| 7 | September 23, 2011 | May 18, 2012 | #144 | 2.03 | ||
| 8 | Wednesday 9:00 pm | October 3, 2012 | May 2013 | TBA | TBA |
Read more about this topic: List Of Supernatural Episodes