Season 1 of 20 to 1 premiered on October 13, 2005.

Season 2 of 20 to 1 premiered on February 13, 2006.

Season 3 of 20 to 1 premiered on September 5, 2006.

Season 4 of 20 to 1 premiered on February 13, 2007.

Season 5 of 20 to 1 premiered on September 11, 2007.

Season 6 of 20 to 1 premiered on February 26, 2008.

Season 7 of 20 to 1 premiered on August 26, 2008.

Season 8 of 20 to 1 premiered on February 5, 2009.

Season 9 of 20 to 1 premiered on February 11, 2010.

Season 10 of 20 to 1 premiered on March 8, 2011.