It's Rebekah like you haven't seen her before. The Vampire Diaries takes us back hundreds of years here.
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Klaus and Rebekah are featured in this photo, from way back in the day. It's a scene from "Ordinary People."
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The Vampire Diaries Season 3 Episode 8 Quotes

Some days, it's a miracle you're still alive. Boy.

Mikael [to Klaus]

Alaric: Careful where you shine that thing. Bat hate the light?
Elena: Wait... what?