Teen Wolf season 5, episode 7 airs tonight, and the mystery deepens as the Dread Doctors continue their hunt.

Last time on ‘Teen Wolf’

Teen Wolf season 5, episode 6, “Required Reading,” began with the discovery of more holes and therefore more chimeras. The pack isn’t doing too well either, as many of them are keeping secrets — Stiles about Donovan, Malia about her mother, and Scott about Kira’s fox spirit.

The crux of the episode comes when the group reads the novel Valack wrote, and subsequently when they begin having visions from their past. Scott sees the death of his dog, Lydia sees an incident with her grandmother, and Stiles sees his mother near the end of her life. By the end of the episode, Theo reveals he knows Stiles’ secret, and we also learn that Hayden is a chimera as well. Read the full recap.

‘Teen Wolf’ season 5, episode 7, ‘Strange Frequencies,’ synopsis

“Scott’s plans to protect the newest victim are derailed when The Dread Doctors attack.”

‘Teen Wolf’ season 5, episode 7, ‘Strange Frequencies,’ clips

The first clip from tonight’s episode has the group trying to protect Hayden. They plan to make the school a trap for the Dread Doctors.

Our first sneak peek shows Kira’s mother attacking her at school, presumably to test her reactions and preparedness. Kira falters at first, but as the Kitsune surfaces, her mother realizes something is wrong.

Another sneak peek shows Theo and Stiles where we left them at the end of episode 6. It’s tense for a moment, but Theo finally seems to convince Stiles they need to work together to get rid of the dead chimera’s body.

Lastly, the game is on against the Dread Doctors, but it doesn’t look like any of our heroes are doing well against them — most especially Scott himself.

Teen Wolf season 5, episode 7, “Strange Frequencies,” airs tonight at 10:00 p.m. ET on MTV.