A sneak peek from Teen Wolf season 4, episode 7, titled “Weaponized,” shows the results of the mysterious illness inflicting the students of Beacon Hills High.

In a new promo video for tonight’s episode, we see Scott, Kira, and Malia lying in an abandoned room, struggling with the sickness that has overcome them. Watch below:

Malia is separated from the other two, and when she reaches into her coat pocket, she brings out a piece of paper. Scott looks decidedly worried, and there’s good reason — she’s got one of the Dead Pool lists in her hand. Is she about to find out her last name isn’t Tate, but is Hale instead?

It quickly becomes apparent that no, she won’t be finding that out just yet. She looks up at Scott and says that she can’t see anything. Scott gets up, but he soon realizes that his vision is also failing. What could they be infected with that would put even an alpha werewolf out of commission?

We won’t have any idea until we watch the episode tonight on MTV. In the meantime, we have gotten some tidbits of information that could help us put some puzzle pieces together. In a recent interview, Executive Producer Jeff Davis said we would soon be meeting a new assassin called The Chemist. It makes sense that someone like this could be using his skills to infect Beacon Hills High School.

And while we still don’t know what disease this is, we do know that it’s going to have deadly results. In recent promos for episode 7, we’ve seen both Braeden and Lydia talking about the death toll associated with the outbreak. Let’s just hope it’s not one of our heroes!

Teen Wolf season 4, episode 7, titled “Weaponized,” airs tonight at 10 p.m. ET on MTV.

What do you think of this latest promo for ‘Teen Wolf’?