During a secret concert, Scott and Stiles come up with a method to trap the new shapeshifter. At the same time, Allison's mother comes up with a plan of her own to take care of Scott once and for all.

Lydia learns more about her bite from Peter. Derek starts thinking he isn't a good leader for his pack and Jackson Whittemore causes more trouble.

With startling new information about the new shapeshifter, Scott and Stiles hurry to protect their friends while Allison is given an investigative task by her family.

Derek becomes convinced that Lydia is the reptilian shapeshifter and forces Scott to help him protect her.

The new shape-shifter strikes again, and Scott recruits a reluctant Allison to acquire a rare book in Gerard's collection.

Scott tries to keep Derek from creating new Werewolves. Chris Argent officially begins Allison's Hunter training. The new creature in town takes another victim.

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

Isaac Lahey's father Mr. Lahey is murdered the night before Isaac's first full moon as a Werewolf. Scott McCall, Stiles Stilinski, and Derek Hale plan a break-out to protect their secret.

Allison's father forbids Scott and Allison to be together. They don't listen and try their best to disobey him. Meanwhile, Lydia goes missing from the hospital and werewolves and hunters go searching. Derek begins recruiting for his Teen Wolf Pack.

Teen Wolf Season 2 Trailer