On the night before Halloween, Mischief Night, a convicted murderer brought to Beacon Hills Hospital for surgery escapes, forcing Scott and his friends to step in to help when his unexpected target becomes clear.

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

Scott and the others try to prevent a disaster; Lydia and Allison seek out an unlikely teacher.

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.

Scott and Lydia join forces. Meanwhile, Stilinski faces a review board.

Kira faces an unexpected enemy.

Scott and Derek call upon their friends and allies to make a last stand.

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

Scott attempts a dangerous plan to draw out The Benefactor. Malia confronts her past.

Scott and Stiles return to La Iglesia to save the Pack from Kate.

On the eve of senior year, Scott and his pack deal with the arrival of a new enemy and the return of an old friend.

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.

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.

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.