THE VAMPIRE DIARIES Season 3 Episode 18 The Murder Of One Sneak Peek : AVIOR OF THE CURSED AND THE DAMNED — Damon (Ian Somerhalder) and Stefan (Paul Wesley) focus a new project that will bring them closer to destroying Klaus (Joseph Morgan), and they quickly bring Elena (Nina Dobrev), Caroline (Candice Accola) and Matt (Zach Roerig) in on the plan. After Klaus threatens someone close to Bonnie (Kat Graham), she has no choice but to work on the spell he needs. Meanwhile, Klaus and Rebekah (guest star Claire Holt) find the perfect motivator to convince Finn (guest star Caspar Zafer) to cooperate with them, but Rebekah is more interested in her own brutal plan to take revenge on Damon. Stefan’s emotional turmoil leads him to a dangerous confrontation with Klaus and, later, to a heartbreaking moment with Elena. J. Miller Tobin directed the episode written by Caroline Dries (#318).