Episode 1 | Creatures of the Night

On the eve of the start of senior year, Scott and his pack are challenged by the arrival of a new enemy.

Episode 2 | Parasomnia

Lydia helps a student with nightmares, while Stiles is wary of a new classmate.

Episode 3 | Dreamcatchers

Scott tracks a dangerous shapeshifter that has been threatening Stilinski.

Episode 4 | Condition Terminal

Stiles works on tracking down a fugitive; Liam tries to be Mason's wingman at a nightclub.

Episode 5 | A Novel Approach

The pack enters Eichen House in order to learn more about the Dread Doctors.

Episode 6 | Required Reading

Scott and his friends follow Dr. Valack's advice and experience strange effects as a result.

Episode 7 | Strange Frequencies

Scott tries to trap one of the doctors. Meanwhile Stiles and Theo try to figure out who is taking the dead bodies.

Episode 8 | Ouroboros

Scott and Malia get help to try to find Hayden and Liam. Deaton discovers something horrific about the dread doctors. Hayden and Liam will be faced with a life and death situation.

Episode 9 | Lies of Omission

While Scott turns to an unlikely ally for help, Stiles and Lydia try to uncover the truth about Parrish.

Episode 10 | Status Asthmaticus

With both lives and friendships on the verge of being destroyed, Scott and his pack face their greatest enemy yet.

Episode 11 | The Last Chimera

Scott, Malia, & Stiles scramble to find a way to save Sheriff Stilinski from an unknown toxin while Liam & Mason search for the whereabouts of Hayden's body and the other dead chimera bodies.

Episode 12 | Damnatio Memoriae

Without the support of his pack, Scott considers that the Dread Doctor's success could mean for Beacon Hills.

Episode 13 | Codominance

Kira's mother sets out on a journey with Kira to help her maintain control of her dark side; Lydia receives a surprise at Eichen House.

Episode 14 | The Sword and the Spirit

As Scott tries to put his pack back together, Malia and her new ally set out to rescue Deaton from The Desert Wolf.

Episode 15 | Amplification

After finding out that Lydia is in danger, Stiles makes a plan to break her out of Eichen House; Theo has his own plans as he joins Deucalion in a quest to kill Scott.

Episode 16 | Lie Ability

While trapped in Eichen House with Theo and the Chimera pack, Scott tries to rescue Lydia before time runs out.

Episode 17 | A Credible Threat

Scott and the pack try to use a charity lacrosse game to figure out the identity of the Beast.

Episode 18 | Maid of Gévaudan

The Pack are trying to figure out how to defeat the Beast of Gévaudan that the Maid of Gévaudan, Marie-Jeanne Valet, faced in 1765. As Gerard Argent, recounts Valet's story to Scott's pack in hopes they can deduce the creature's w...

Episode 19 | The Beast of Beacon Hills

Now that the beast's identity is known, Scott and his pack race against time to stop the Dread Doctors.

Episode 20 | Apotheosis

Loyalties are tested and new alliances forged as Scott and his friends work to stop the Beast before Beacon Hills is razed to the ground.