Well, I don't know what you're exact question is: whether you're talking about the Season 2 DVD or when Season 3 starts or something else, so...
The series started with Season 1, which premiered on September 19, 2007. Season 2 began on September 1, 2008. Season 3 premiered on September 14, 2009. And the Season 2 DVD came out around the same time that S3 started.
