The CW Network has released two trailers for Season 4 of The Vampire Diaries, returning with "Growing Pains" Thursday, October 11 at 8 PM ET. Be warned, if you haven't caught up with Season 3 yet, there will be some major spoilers contained within. Nina Dobrev returns as Elena, who must face the cold hard fact that warm blood no longer courses through her veins. Take a look at the latest footage from the upcoming season.