Stefan is officially on the loose — and he's hungry. 

In the newly released promo for The Vampire Diaries Season 5, Episode 3 ("Original Sin"), we see Stefan walk into a bar and drain the bartender. But is he back to his Ripper ways? Or did not feeding for three months result in a tidal wave of bloodlust? We're thinking it's the latter. After all, Stefan has his hallucinations of Elena to help him cope. 

Meanwhile, Damon, Elena, and Katherine are on the hunt to find Stefan — again — and keep him from draining the population of Mystic Falls. But according to the official episode synopsis, a mysterious woman (Tessa) thwarts the trio's search party. This might have something to do with why Tessa was pointing a gun at Katherine in the Episode 3 spoiler pics. Why does she not want Stefan to be found? Is there something she knows about his past? Cue a "flashback to a distant time and place" where we'll get to see how Stefan and Tessa met. Tessa has her own motives for finding Stefan, and we have a feeling her master plan isn't going to go over well with the Mystic Falls gang. 

Meanwhile, Matt's life is put in danger after Silas forces "an unwilling accomplice to help him search for Katherine." Is Silas really going to put Matt's life in danger again? Or is his unwilling accomplice someone else — like Bonnie or Jeremy? Whoever it is, we're really tired of seeing Matt's life being put on the line. We guess that's just par for the course when you're the only human in Mystic Falls.

Watch the promo below, and tell us what you think in the comments! Do you think Stefan is back to his Ripper ways? 

Catch the next episode of The Vampire Diaries on Thursday, October 17 at 8 p.m. ET on the CW, followed by the series premiere of Reign. 

Crystal Bell is an editor at Wetpaint Entertainment and our resident fangirl for all things The Vampire Diaries. Follow her on Twitter and Google+!