The Vampire Diaries -- ''Gone Girl'' -- Image Number: VD515a_0096.jpg -- Pictured: Nina Dobrev as Katherine -- Photo: Blake Tyers/The CW -- © 2014 The CW Network, LLC. All rights reserved Photo

From: Photo Flash: First Look at this Week's Episode of THE VAMPIRE DIARIES

On this week's episode of THE VAMPIRE DIARIES, airing March 6 on The CW, and titled 'Gone Girl,' while Nadia (guest star Olga Fonda) remembers her centuries-long search for her mother, Stefan (Paul Wesley), Caroline (Candice Accola) and Matt (Zach Roerig) come up with a desperate new plan to save Elena's (Nina Dobrev) life. For the second time, Bonnie (Kat Graham) and Jeremy (Steven R. McQueen) must turn to Liv (guest star Penelope Mitchell) for help. Damon baits Tyler (Michael Trevino) into a nasty confrontation, then takes off to seek revenge on Dr. Wes (guest star Rick Cosnett). Caroline and Tyler come to a new understanding. Finally, Bonnie learns of a terrifying secret that will threaten the lives of all her friends. Lance Anderson directed the episode written by Melinda Hsu Taylor (#515).