Sage delivered a pair of shocks to Damon on last week's episode of The Vampire Diaries, first showing up in Mystic Falls after a century away, and then turning on him by burning down the town bridge.

But the unexpected tables will turn on this ancient blood sucker tonight, Cassidy Freeman told me over the phone.

"Sage has a big surprise coming," the actress teased of events ahead on "The Murder of One." "And it's definitely life-changing."

Freeman couldn't divulge many details, of course, but she did confirm Sage will come face-to-face with Finn this week, along his disapproving siblings, including a returning Klaus.

What exactly is the problem these Originals have with the redhead?

"Imagine your brother's high school girlfriend," Freeman explained. "Except it's not high school. You're a vampire and you live forever. To Klaus and Rebekah, Sage isn't good enough to be with Finn. They're full of animosity, there's a lack of respect all around."

Look for the Originals' storyline to "come to a head" by the end of the hour, as well, Freeman previewed.

What role might Sage play in their fate? It's unknown if the character will be back when The Vampire Diaries returns on April 19, but Freeman says  she'll try to have the most fun she can in the meantime.

"She's 900 years old. She accepts that this is the way it is. She doesn't think anything is gonna change any time soon, so her M.O. is to have a really good time, to live life to the fullest."

And maybe offer Elena some advice before she departs? I asked Freeman what Sage might say to this confused teen, stuck between two attractive vampires.

"She'd tell her to get over it," the actress said. "Just get over it and get in the shower with them!"

Matt Richenthal is the Editor in Chief of TV Fanatic. Follow him on Twitter and on Google+.