Probably sometime at the end of the year. Right now season four is still airing on TV.
September 10th
Supernatural Season 4 Part 1 is out on sale now. Part 2 will be out soon.
march 22 however,supernatural season 7 is out on dvd and available at dvds-home.net
September 1st, 2009
Supernatural season 4 was released September 1, 2009. You can find it at Target, Wal-Mart, Blockbuster online and other stores that sell or rent DVDs.
Season 4 is on DVD now. It's been out for a few months now.
eventually
September 2011
Supernatural season 7 release on DVD is in mid-September, and it comes out in Netflix ($8.00 mo.) on September 22, 2012 (tomorrow! YAY!) Supernatural season 8 begins airing sometime in October, 2012. -Hope this helped!
Supernatural : The Complete Fifth Season will be released on Sept. 7, 2010 .
25th Aug 2008
September 10th 2008