Damon & Elena / I'm Lost without Du

Proving that Du can't keep a good bad girl down, Smallville alum Cassidy Freeman returns to The CW to bedevil another crazy-hot cast. "I guess they're trying to tell me something," says the former Tess Mercer with a laugh. "When I was cast on Smallville, I was like, 'Really? Evil angry girl?' Because I can't stop laughing in real life."

In the March 15 Vampire Diaries episode — a flashback to 1912 — Freeman plays Sage, a bloodsucker with ties to the Originals, as well as Ian Somerhalder's Damon. "She [is] really aware of what being a vampire is and owns it," says Freeman, who says it "has been a dream to play a vampire" and that she was "jumping for joy" when she got the part. Sage will also resurface in modern-day Mystic Falls with a murky agenda. "She comes back for good reasons, but she is [out] for herself."
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The House Guest
Even though Elena, Damon, and Stefan and tired of Katherine's constant mind games, they realize that Katherine's knowledge of Mystic Falls history will help them survive. Caroline finds a new way to get Matt's attention after feeling frustrated with their relationship. Alaric reveals some shocking information to Jenna, and Katherine makes a different kind of confession to Damon. Stefan and Bonnie try to convince Jonas and Luka that they should all be working together, but Jonas' lack of trust leads to a violent and intense confrontation.