According to tvfanatic the forth season of Vampire Diaries will air:
Thursday, October 11
8 p.m. The Vampire Diaries
9 p.m. Beauty and the Beast
Season 3 ended with the surprise of Elena being turned into a Vampire in order to save Matt’s life. She also made the long awaited choice between the brothers by choosing Stefan. We this change now that she is a vampire and is anyone safe once she gets her thirst.