Warner Bros. launched the Supernatural Season 4 DVD website. The site includes videos, gallery and downloads sections (Thanks to Supernatural Wiki for the heads-up).
The Season Four DVD and Blu-ray will be released on September 1, 2009 and include:
* Season Four's 22 Episodes
* The Mythologies of Supernatural: From Heaven to Hell – Three sections featurette gallery bridging Heaven, Purgatory and Hell to examine key methological precepts
* Commentary on 3 Key Episodes by Executive Producers and writers
* Extended/Unaired scenes
* Gag Reel