Series Overview
| Season | Episodes | Originally aired | DVD release dates | U.S. viewers (million) |
Season rank |
Season 18–49 rank |
||||
|---|---|---|---|---|---|---|---|---|---|---|
| Season premiere | Season finale | Region 1 | Region 2 | Region 4 | ||||||
| 1 | 6 | March 24, 2005 (2005-03-24) | April 26, 2005 (2005-04-26) | August 16, 2005 (2005-08-16) | April 10, 2006 (2006-04-10) | August 16, 2006 (2006-08-16) | 5.4 | #102 | #45 | |
| 2 | 22 | September 20, 2005 (2005-09-20) | May 11, 2006 (2006-05-11) | September 12, 2006 (2006-09-12) | January 28, 2008 (2008-01-28) | April 4, 2007 (2007-04-04) | 8.0 | #67 | #29 | |
| 3 | 25 | September 21, 2006 (2006-09-21) | May 17, 2007 (2007-05-17) | September 4, 2007 (2007-09-04) | July 20, 2008 (2008-07-20) | August 20, 2008 (2008-08-20) April 22, 2009 (2009-04-22) |
8.3 | #68 | #27 | |
| 4 | 19 | September 27, 2007 (2007-09-27) | May 15, 2008 (2008-05-15) | September 2, 2008 (2008-09-02) | June 14, 2010 (2010-06-14) | September 20, 2009 (2009-09-20) December 2, 2009 (2009-12-02) |
8.0 | #77 | #27 | |
| 5 | 28 | September 25, 2008 (2008-09-25) | May 14, 2009 (2009-05-14) | September 8, 2009 (2009-09-08) | February 7, 2011 (2011-02-07) | September 29, 2010 (2010-09-29) March 2, 2011 (2011-03-02) |
9.0 | #52 | #11 | |
| 6 | 26 | September 17, 2009 (2009-09-17) | May 20, 2010 (2010-05-20) | September 7, 2010 (2010-09-07) | January 30, 2012 (2012-01-30) | August 4, 2011 (2011-08-04) November 9, 2011 (2011-11-09) |
7.8 | #52 | #15 | |
| 7 | 26 | September 23, 2010 (2010-09-23) | May 19, 2011 (2011-05-19) | September 6, 2011 (2011-09-06) | September 3, 2012 (2012-09-03) | August 22, 2012 (2012-08-22) November 7, 2012 (2012-11-07) |
7.7 | #53 | #16 | |
| 8 | 24 | September 22, 2011 (2011-09-22) | May 10, 2012 (2012-05-10) | September 4, 2012 (2012-09-04) | February 13, 2013 (2013-02-13) | 6.5 | #87 | #35 | ||
| 9 | 25 | September 20, 2012 (2012-09-20) | May 16, 2013 (2013-05-16) | September 3, 2013 (2013-09-03) | 5.1 | #94 | #43 | |||
Read more about this topic: The Outburst
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“As Cuvier could correctly describe a whole animal by the contemplation of a single bone, so the observer who has thoroughly understood one link in a series of incidents should be able to accurately state all the other ones, both before and after.”
—Sir Arthur Conan Doyle (1859–1930)