As we know from last week's Vampire Diaries, Bonnie has been given the secret of how to kill Klaus. But will she make the ultimate sacrifice for her best friend, Elena?
"She is facing life and death responsibilities, so it's going to be up to her love for Elena, how much she is willing to sacrifice and what she's not," Katerina Graham says.
"Klaus is after Elena to sacrifice her, to kill her on an altar," she adds.
"[And] they need a witch. So besides the fact that killing Klaus, if she even tries to, might take her down, there's also the fact that he needs a witch for the sacrifice."
In short, it doesn't look good for Bonnie.
Is Bonnie living on borrowed time?
Graham admits Bonnie is in danger: "I don't feel safe about myself or anyone. Unfortunately, we were told from the beginning that many people will go. I'm no exception."
Gulp. So when will she and Klaus come face to face at last?
She won't say, but does tell E! that it will be up there with, if not surpassing the head-turning arrivals of Katherine and Elijah. "Oh, you have no idea. You have no idea."
"It's going to freak everyone out. It's the last thing you'd expect."
As for the blossoming Bonnie-Jeremy romance, she says "you'll see the relationship she has with Jeremy really solidify and you start to see them growing as partners."
"They'll also go through issues, but you really see their growth."
Want more The Vampire Diaries?
Sign up for our daily newsletter and receive the latest tv news delivered to your inbox for free!