The CW just released this sneak preview from the upcoming episode “Know Thy Enemy” from season 2 of “The Vampire Diaries” airing Thursday, 8:00 PM et/pt on The CW.

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Series Synopsis: The Vampire Diaries is based on a novel series penned by L.J. Smith where you are given the insight into the diary of 17-year old Elena Gilbert (Nina Dobrev). Elena and her 15-year-old brother, Jeremy (Steven R. McQueen), live with their Aunt Jenna (Sara Canning). Elena seeks comfort from her familiar social circle – best friend Bonnie (Katerina Graham), frenemy Caroline Forbes (Candice Accola,) and former boyfriend Matt Donovan(Zach Roerig, Friday Night Lights).

At Mystic Falls High, Elena and her friends become fixated by a mysterious new student, Stefan Salvatore (Paul Wesley, “Fallen”). Stefan and Damon(Ian Somerhalder, “Lost”) are vampire brothers – one good, one evil – at war for Elena’s soul.

The Vampire Diaries is from Alloy Entertainment and Bonanza Productions Inc in association with Warner Bros. Television and CBS Television Studios.

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