'Vampire Diaries' Season 5 Spoilers: Stefan and Caroline Tell Tyler, Matt, Bonnie and Jeremy About Katherine's Evil Secret, Watch Video Clip For Episode 15 'Gone Girl'

Stefan Salvatore (Paul Wesley) and Caroline Forbes (Candice Accola) discovered Katherine Pierce's (Nina Dobrev) secret in "The Vampire Diaries" Season 5, Episode 14 "No Exit." A video clip for the next episode has been released and it previews how Stefan and Caroline expose Katherine's secret to the rest of the TVD gang.

The video clip for Episode 15 shows how Caroline, Stefan, Tyler (Michael Trevino), Matt (Zach Roerig), Bonnie (Kat Graham) and Jeremy (Steven R McQueen) put the pieces together of Katherine's deception through Elena's (Nina Dobrev) recent behaviour around them. Now that everyone knows that Katherine has been living in Elena's body, they must come up with a plan to save their friend Elena Gilbert. Click HERE to watch the video clip.

The episode's synopsis revealed that Stefan, Caroline and Matt become desperate in finding ways to save Elena. The Examiner report speculates that Katherine will be cooking up something when she discovers that everybody has found out about what she did to Elena.

The previously released promo video showed Katherine bravely walking into the Salvatore mansion asking everyone "So, which one of you is going to kill the elusive Katherine Pierce?" Will the Petrova doppelganger really die in this episode?

Another character speculated to meet her end in the CW TV series is Katherine's daughter, Nadia (Olga Fonda). In the previous episode, Nadia revealed to her mother that the hybrid Tyler bit her arm during their fight.

The spoiler report further added that viewers can expect a lot of flashbacks from Nadia, who will recount the really long search for Katherine. Damon, still on "Ripper" mode, continues to seek revenge on Dr Wes Maxfield (Rick Cosnett).

In the Hypable report, the synopsis for Episode 15 titled "Gone Girl" reads: "While Nadia remembers her centuries-long search for her mother, Stefan, Caroline and Matt come up with a desperate new plan to save Elena's life. For the second time, Bonnie and Jeremy must turn to Liv for help. Damon baits Tyler into a nasty confrontation, then takes off to seek revenge on Dr. Wes. Caroline and Tyler come to a new understanding. Finally, Bonnie learns of a terrifying secret that will threaten the lives of all her friends." Click HERE to see the promotional photos for the upcoming episode.

"The Vampire Diaries" Season 5, Episode 15 titled "Gone Girl" is scheduled to air on Thursday night, March 6, at 8 pm ET on the CW Network.

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