'The Vampire Diaries' Season 8 Episode 4 Spoilers: Nina Dobrev Returns As Sybil's Sister And Kills Damon? Stefan Stabbed! Salvatore Brothers Doomed?

"The Vampire Diaries" is in its last run and the events in Mystic Falls are becoming more dark and intense. The next "TVD" episode suggests that Sybil is the most evil in the "The Vampire Diaries" villains. But could it be possible that Nina Dobrev's Elena is connected to her character?

Nathalie Kelley speaks with The Vampire Diaries and the actress playing as Sybil in "TVD" teases about the history of her character. The "The Vampire Diaries" star admitted that Sybil is a "true villain."

The actress explained that "The Vampire Diaries" Season 8 episode 4 "An Eternity of Misery" will explain the tragedy that made Sybil what she is today. The next "TVD" episode will let the audience understand why Nathalie Kelley's character is cruel and manipulative.

 I can finally post about what I've been doing for the last 2 months and the reason for my radio silence.. Meet Sybil, the new baddie on last season of Vampire Diaries u can watch me tonight on CW 8pm EST and throughout this whole season a HUGE thank you to @julieplec and @thecw for this incredible opportunity makeup by the one and only @ambercrowemua #impossiblefilm

A photo posted by nathalie kelley(@natkelley) on Oct 28, 2016 at 3:57pm PDT

In the same interview, "TVD" fans learned that Sybil has a sister but the identity remains anonymous. However, Sybil's relationship with her sister in "The Vampire Diaries" is somehow similar to Salvatore brothers. Damon (Ian Somerhalder) and Stefan (Paul Wesley) are very different and so are Sybil and her sister.

Could it be that Sybil's sister is Nina Dobrev's Elena Gilbert? Well, it's too early to confirm. Nina Dobrev's potential return in "The Vampire Diaries" Season 8 remains unconfirmed. However, many are hoping to see Nina Dobrev and Ian Somerhalder's Delena reunion in the last run of "TVD." Unfortunately, there might be a big twist.

According to Aussie Network News, there are rumors that Elena will kill Damon. In the last "TVD" episode, fans thought that Stefan and Alaric already had their victory over the Siren but things will get complicated as Sybil manipulate her sister who is just out there in the next episode of "The Vampire Diaries" Season 8.

The Salvatore brothers are doomed. The "TVD" teaser featured Sybil telling Stefan they are doomed and Damon can't escape his fate. Stefan was also stabbed in the back by a yet-to-be-revealed villain. Is Elena awake? Does this suggest that Nina Dobrev is returning in "The Vampire Diaries" Season 8 and that her character is somehow connected to Nathalie Kelley's Sybil?

"The Vampire Diaries" Season 8 Episode 4 titled "An Eternity of Misery" will air on Friday, Nov. 11, 8 p.m. EST on the CW. Stay tuned for more "TVD" spoilers and update.