Nielsen Ratings
| Season | Timeslot (EDT) | Season Premiere | Season Finale | TV Season | Rank | Viewers (in millions) |
|---|---|---|---|---|---|---|
| 1 | Thursday 8:00 PM | September 22, 2005 | May 11, 2006 | 2005–2006 | #120 | 4.3 |
| 2 | Sunday 7:00 PM (October 1–8, 2006) Monday 8:00 PM (October 16, 2006 – May 14, 2007) | October 1, 2006 | May 14, 2007 | 2006–2007 | #137 | 2.7 |
| 3 | Monday 8:00 PM (October 1–10, 2007) Sunday 8:00 PM (March 2 – May 18, 2008) | October 1, 2007 | May 18, 2008 | 2007–2008 | #198 | 2.3 |
| 4 | Friday 8:00 PM | October 3, 2008 | May 8, 2009 | 2008–2009 | #176 | 1.7 |
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