DVDs Region 1 US

Season Release Date Buy Now
Season 1 (DVD) 11th September 2007 Amazon.com
Season 2 (DVD) 8th January 2008 Amazon.com
Season 3 (DVD) 13th May 2008 Amazon.com
Season 4 (DVD) 23rd September 2008 Amazon.com
Season 5 (DVD) 12th May 2009 Amazon.com
Season 6 (DVD) 1st September 2009 Amazon.com
Season 7 (DVD) 21st September 2010 Amazon.com
Season 8 (DVD) 6th September 2011 Amazon.com
Season 9 (DVD) 28th August 2012 Amazon.com
Season 10 (DVD) 24th September 2013 Amazon.com

DVDs Region 2 EU

Season Release Date Buy Now
Season 1 (DVD) 12th September 2005 Amazon.co.uk
Season 2 (DVD) 28th August 2006 Amazon.co.uk
Season 3 (DVD) 19th May 2008 Amazon.co.uk
Season 4 (DVD) 6th October 2008 Amazon.co.uk
Season 5 (DVD) 13th April 2009 Amazon.co.uk
Season 6 (DVD) 19th October 2009 Amazon.co.uk
Season 7 (DVD) 11th October 2010 Amazon.co.uk
Season 8 (DVD) 8th August 2011 Amazon.co.uk
Season 9 (DVD) 8th October 2012 Amazon.co.uk
Season 10 (DVD) 7th October 2013 Amazon.co.uk