Stiles is suspicious of a new classmate; and Lydia helps a student with night terrors.

Scott tracks a new shapeshifter that's threatening Stilinski; and Malia receives information about her mother.

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

After following Dr. Valack's advice, Scott and the others begin to experience strange things.

Stiles is suspicious about a new girl showing up and what her intentions are. Scott's plans to protect the newest victim are derailed when The Dread Doctors attack.

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.

Scott finds himself turning to an unlikely ally for help. Stiles and Lydia attempt to find out the truth about Parrish.

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

Scott and Stiles try to learn what is behind the mysterious infection that is killing the town sheriff.

Even without the support of his pack, Scott considers what the Dread Doctors' success means for Beacon Hills.

Kira and her mother make a journey to help Kira deal with her dark side; Lydia is surprised at Eichen House.

Upon learning that Lydia is in danger, Stiles makes a plan to break her out of Eichen House; Theo has his own plans.

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

Scott and his pack use a charity lacrosse game in a deadly gambit to figure out the identity of the Beast.

Scott, Stiles, Lydia, Malia, and Liam 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 weaknesses.

With the identity of the Beast finally revealed, Scott and his friends are in a race against time to stop The Dread doctors from implementing their final plan.

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.

With graduation approaching, a supernatural force rides into Beacon Hills and crosses paths with Scott and his friends, while Liam discovers evidence of a new enemy in the high school.

Scott, Lydia and Malia search for Stiles; Liam and the others throw a party in order to keep a friend safe from the Ghost Riders.

Scott and Liam protect the lacrosse team from an attack; Lydia searches for clues in Stiles' disappearance.

Scott, Lydia and Malia search for clues about the Wild Hunt in a mysterious place called Cannan while Liam and and Hayden take drastic measures in the fight against the Ghost Riders.

Scott and Liam make an attempt to capture a Ghost Rider; Malia and Peter try to find a way into the Wild Hunt.

Scott, Lydia and Malia decide to storm the rift and rescue Stiles; Liam, Hayden and Mason make a deal with Theo to learn Douglas' plan.

The fate of Beacon Hills hangs in the balance as Scott and his pack face off against Douglas in a final showdown.