Supernatural Season 9 was set to premiere on October 15th, but the CW has just announced that the first episode will air one week early. The new premiere date is October 8th at 9:00pm and the change was made due to a schedule shift for The Vampire Diaries spin-off show, The Originals.
If you're looking to catch up on Supernatural Season 8, it's being released to Blu-ray / DVD on September 10th:
"After a year apart, the Winchester brothers reunite after Dean (Ackles) escapes from Purgatory with the help of a vampire named Benny (Olsson). Dean heads straight for Sam (Padalecki), but the reunion isn't exactly everything he imagined it would be. Although Sam drops everything to join his brother, leaving the life he had grown accustomed to turns out to be harder than he imagined. In the meantime, Benny's help turns out to be more than what Dean bargained for. As the brothers struggle with their return to hunting, they make a shocking discovery that could lead them on a deeply personal mission to settle old scores."
Bonus Features Include: