Please read the following table in Markdown format and then answer the question according to the table. Table cells in one row are seperated by '|', and different rows are seperated by '
'.

Table:
| Season | First Aired | Last Aired | Episodes | Network |
| --- | --- | --- | --- | --- |
| 1.0 | July 10, 2007 | December 28, 2007 | 18.0 | NBC |
| 2.0 | June 16, 2009 | August 15, 2009 | 10.0 | CMT |
| 3.0 | January 22, 2010 | August 20, 2010 | 18.0 | CMT |
| 4.0 | April 8, 2011 | June 17, 2011 | 10.0 | CMT |
| 5.0 | April 20, 2012 | July 23, 2012 | 10.0 | CMT |
Question:
Of the series that last aired August 20, 2010, what is the lowest number of seasons?
Answer:
3.0