The werewolf storyline finally takes over in the September 23 new episode of The Vampire Diaries.  We previously posted promo photos for this episode, when Tyler learns more about his Uncle Mason, and now the CW has released a minute long trailer for it.

STEFAN FACES A NEW DANGER

Elena (Nina Dobrev), Damon (Ian Somerhalder) and Alaric (Matt Davis) take a road trip to Duke University and search through Isobel’s research on folklore and paranormal phenomena to see if they can uncover any clues to the mystery surrounding the Lockwood family.

Isobel’s former student, Vanessa (guest star Courtney Ford, “Dexter”) offers to guide them through the research and ends up getting quite an education herself.  Stefan (Paul Wesley) comes face to face with a terrifying new danger in the woods, and Tyler (Michael Trevino) makes a shocking discovery about Mason (guest star Taylor Kinney). Steve R. McQueen, Katerina Graham, Sara Canning and Zach Roerig also star.