Katherine (Nina Dobrev) and Stefan (Paul Wesley) have a long and storied history on The Vampire Diaries but is it over? Will these two former lovers rekindle the flame in Season 5 of TVD? Given that recent spoilers suggest Katherine still has feelings for one Salvatore, we speculate the likelihood of Stefan and Katherine rekindling their romance below.

The doppelganger connection

There’s been much talk about how the universe wants the doppelgangers together, about how they will always find one another. Tessa was using this line to try to scare Damon into joining Team Vengeance (or, maybe, just to make herself feel better). This implies that the doppelgangers meant to be together are Stefan and Elena, but what if a different Petrova doppelganger is Stefan’s one true love? Katherine and Stefan fell in love once back in 19th century Mystic Falls and, even though Katherine chose to stay away from Stefan in the century-and-a-half long gap between Mystic Falls then and Mystic Falls now, it was arguably to keep herself (and him?) safe from Klaus’s neverending pursuit. Even so, she always kept tabs on Stefan. For someone who actively tries and usually succeeds to forget everyone she has ever met, the way that Stefan stayed in her heart means something.

Stefan has changed

When Katherine popped back into Stefan’s life after the aforementioned 150-year absence, Stefan wasn’t exactly dying to see her. (This might have had something to do with Katherine’s emotional and physical terrorism of Elena.) A romance between Stefan and Katherine never seemed possible because Stefan never showed any interest but we’re dealing with a changed Stefan now. He feels abandoned by the two people he loved most. Could the three months Stefan spent in the bottom of a quarry have changed his perspective enough to let Katherine back into his heart? We think so. According to the episode synopsis for this week’s Season 5, Episode 8 (“Dead Man on Campus”), “Katherine … manages to get through to Stefan, who is still struggling to overcome the events of the summer.” Sounds like these two will be growing closer...

Katherine has changed

Stefan isn’t the only one who has changed to become more vulnerable in recent episodes. Katherine has been going through a glacial change in priorities and perspective since her transformation back to human from invincible vamp. Her life has further been shocked by the realization that she only has a few months to live. We think this change in circumstance may lead to Katherine taking more risks when it comes to her heart because what does she have to lose? In the episode synopsis for Season 5, Episode 9 (“The Cell”), “Stefan continues to offer Katherine his support while trying to mask his own pain.” This sounds like the perfect conditions for the development of romantic feelings.

The Delena factor

Even if Katherine and Stefan don’t fall madly in love, that doesn’t rule out some steamy hookups. There’s nothing like jealousy to fuel a misguided knocking-of-boots, and Delena’s happily ever after could push Stefan over the edge. What better way to cause Delena pain than a hookup with Elena’s most loathed doppelganger counterpart? And, for Katherine’s part, as Delena recently tried to kill her, we can imagine that she would equally be on board with a “friends with benefits” scenario with Stefan, just to unsettle the reigning vamp king and queen of Mystic Falls.

Do you think Stefan and Katherine will hook up in Season 5? Sound off in the comments below!

Catch the next episode of The Vampire Diaries on Thursday, November 21 at 8 p.m. ET on the CW, followed by an all-new episode of Reign.