The CW has released an official synopsis, photos and clips of The Vampire Diaries' Halloween episode "Haunted."

As Vickis (Kayla Ewell) behavior becomes more dangerous, Stefan (Paul Wesley) tries to help her. Elena (Nina Dobrev) tries to convince Jeremy (Steven R. McQueen) to stay away from Vicki. Caroline (Candice Accola) gives Bonnie (Katerina Graham) a necklace she took from Damon (Ian Somerhalder) to wear with her Halloween costume, and when Damon tries to take it back, he is surprised by Bonnies abilities. Bonnie discusses the incident with Grams (guest star Jasmine Guy) and learns more about her familys past. Trying to cheer Vicki up, Matt (Zach Roerig) takes her to the high schools haunted house, but the evening soon takes a terrifying turn. Michael Trevino also stars.

Ernest Dickenson ("Tales from the Crypt: Demon Knight") directed the episode, which was scripted by Kevin Williamson ("Scream," "The Faculty") and Julie Plec ("Kyle XY"), and based on a story by Andrew Kreisberg.

"The Vampire Diaries" airs Thursdays at 8-9 p.m. ET on The CW.

Photos © 2009 The CW Network, LLC. All Rights