The title of the next all-new episode of The Vampire Diaries Season 5, Episode 18 (“Resident Evil”) — is becoming all too literal with the latest spoiler out of the TVD camp. According to TV Guide, our heroes will soon learn that the Travelers have already planted themselves as Passengers in many a Mystic Falls resident — including more than one of our main characters! Who might be unknowingly carrying a Traveler Passenger along with them?! We speculate below.

This is definitely bad news for our heroes, given that Passengers are able to take control of whichever body they happen to be inhabiting. So, who might they have already infiltrated? Well, we kind of hope Damon (Ian Somerhalder) is one of them. Then, we can blame his Passenger for all of the terrible things he’s done over the last few weeks. Of course, he seems to remember killing Aaron Whitmore and letting Enzo almost kill Jeremy, so this isn’t really a very likely explanation, but a website can dream! After all, one of our hopes for the end of Season 5 is finding a way to retcon Damon’s character back to the days of his continuous character development arc. Could this be the show’s chance?

It probably makes more sense that a Passenger is inhabiting either Jeremy, Matt, or Tyler, given that the Traveler knife has mysteriously disappeared from right under the motley gang’s noses. In the synopsis for Season 5, Episode 19 (“Man on Fire”), we learn: “Damon demands the Traveler knife, forcing Jeremy and Matt to admit it has gone missing.” If one of them is a Passenger, it explains how it could have disappeared so easily. Our money is on either Jeremy or Tyler, as Matt has already had a Passenger in the form of Nadia’s boyfriend, Gregor. It’s just not fair if Matty Blue Eyes is possessed twice. Besides, if we were a Traveler, we’d definitely go for the vampire hunter or the hybrid over the human. Sorry, Matt! Given that Tyler will be playing a part in an upcoming Traveler ritual, we wonder if he isn’t the one who unknowingly has a Passenger inside of him. Creepy.

Now, for our out-of-left-field guess: Caroline (Candice Accola). She’s been spending a lot of time with the Travelers, and they could have Passengered her when she busy worrying about Stefan. Also, we want Caroline to play a main part in every storyline — even the dangerous ones. Because she is the best.

Which of our heroes do you think has a Passenger inside of them? Share your theories in the comments below!

Catch the next episode of The Vampire Diaries on Thursday, April 17 at 8 p.m. ET on the CW.

Kayti Burt is a contributing writer for Wetpaint Entertainment with a penchant for all things pop culture. Follow her on Twitter and Google+!