Scott and the others are trapped inside the high school as the Alpha draws near.

The hunt is on for Derek's whereabouts, meanwhile Stiles tries to help Scott with controlling his transformation when a second full moon is approaching.

Jackson seeks out a specialist regarding the wound on his neck.

Scott tries to keep Derek from creating new werewolves; Argent officially begins Allison's training; the new creature in town takes another victim.

When the new shapeshifter strikes again, Scott has to recruit a reluctant Allison to acquire a rare book in Gerard's collection, while also once again surviving dinner with her family.

Derek becomes convinced that Lydia is the shapeshifter they're after, forcing Scott to gather his friends -- and even some enemies -- to protect her.

Even as his relationship with Allison becomes further strained, Scott and Stiles must attend Lydia's birthday party while Derek locks his new wolves up to watch after them on their first full moon together.

Scott, Stiles, Melissa and Stillinski are taken hostage; Allison tracks Derek to the station.

Scott plays in the championship lacrosse game and must figure out a way to stop Gerard. Meanwhile, Allison continues her hunt for Derek and his pack.

Scott races to uncover Gerard's master plan following a shocking death on the lacrosse field. Derek plots to take Gerard down using his own methods. Erica and Boyd are captured as Allison continues her merciless bloodthirsty revenge on the werewolves for her mother's suicide. Meanwhile, Scott, Stiles, Lydia, Melissa and Isaac are all under pressure amidst the chaotic events.

With Boyd and Cora on the loose and under the influence of the full moon, Scott and Derek must turn to an unlikely ally for help.

While Scott tries to keep Isaac from engaging in a deadly confrontation with the Twins in school, Stiles attempts to prove his theory that the killings have nothing to do with werewolves.

As Allison begins to suspect someone dangerously close to her may be involved in the murders, Scott and Stiles conclude that Lydia’s rising talents may be their best bet to solving the murders.

With the threat growing far more personal and time running out on innocent lives, Scott is forced to make a difficult choice in order to save both friends and family while, at the same time, Derek and Peter try to figure out how to save Cora’s life.

Scott and his friends ponder catching the werecoyote before it is hunted down; an unlikely ally helps Derek and Peter break out.

Stiles goes missing; Scott and the others set off on a search; Lydia tries to master her new abilities.

Scott and the others seek an important artifact; Stiles must make a decision about Eichen House.

An important clue is revealed in the story of a World War II internment camp; Kira's role is more crucial, and she discovers unusual abilities.

Kira faces an unexpected enemy.

Whilst Stilinski investigates a murder, Scott has his place on the Lacrosse team threatened by a freshman.

A mysterious outbreak takes over the high school.

Scott and his Pack begin a dangerous battle against an old enemy.

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

In hopes of learning more about the Dread Doctors, the pack goes into Eichen House.

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

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

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

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.

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

While Liam and Theo act as decoys, Scott, Lydia and Malia enact a desperate plan to try and remember Stiles.

Scott and Malia search for the owner of a unique bullet, fearing that a new breed of werewolf hunter has come to Beacon Hills. At the same time, Lydia must face her own fears of Eichen House.

When Scott and the others struggle to protect two new werewolves, an unlikely ally joins in the fight.

Scott and Malia prepare for battle while Argent searches for an old ally.