Claire Holt

Elena's back-stabbing ways may come back to haunt her on The Vampire Diaries.

In the CW series' midseason finale, Elena (Nina Dobrev) proved that she, too, was capable of killing when she stabbed and killed Rebekah (Claire Holt) as she prepared for the homecoming dance. But since when has being dead stopped a vampire?

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"We haven't seen the last of Rebekah," executive producer Julie Plec tells TVGuide.com. "The fact that Elena killed Rebekah is going to come back to bite her in the butt."

When the series picks up in January, not only does the Original sister return in a flashback, but she also makes her presence felt in the present day.

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"I'm not going to say when she makes her reappearance, but certainly her being undaggered is not in Elena's best interest," Plec teases.

The Vampire Diaries returns to the CW on Thursday, Jan. 5 at 8/7c.

What do you think is in store for Elena?