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 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.

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

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.

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

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.

When one of their friends goes missing, Scott and the pack travel into Mexico on a search and rescue mission.

Scott teams up with an unlikely source in the hopes of putting an end to Kate's evil plan.

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

When the full moon is out, Lydia's lake house brings uninvited guests, and Derek hunts for a killer.

Scott, Stiles and Kira participate in their first Lacrosse game; Lydia looks to get help controlling her powers.

A dangerous enemy forces Scott to help him. Derek and Malia track down an old ally.

A mysterious outbreak takes over the high school.

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

An assassin targets Scott and Liam at the lacrosse team's annual bonfire.

Scott and Kira fight to protect Satomi's pack from assassins.

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

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

The secret behind Derek's tattoo is revealed and the Alpha pack make their presence known. Derek and Isaac struggle to locate Erica and Boyd.

Allison and Lydia locate a possible clue to finding Boyd and Erica while one of Stiles' childhood friends goes missing.

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.

During a bus ride to a cross country meet, Scott and his friends flash back to the events of a preemptive strike against the Alphas that has left several injured and possibly one or more dead.

Stranded at a motel for the night because of the postponed cross country meet, Scott and the others suffer strange experiences that cause them to believe members of their own group may the mysterious killer’s newest targets.

As the danger begins to reach closer to Scott, threatening his trusted mentor and boss, Deaton, Kali and the Twins go after Derek.

Seeking answers, Scott, Allison and Stiles hear stories told by two unlikely narrators and discover a secret about the color of a werewolf’s eyes.

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.

Trapped inside an evacuated Beacon Hills hospital by a powerful storm, Scott and Derek must defend themselves against the Alphas while trying to figure out how to save Cora’s life.

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.

Under Deaton’s advice, Scott and his friends use an ancient but extremely dangerous ritual to help them both save the lives of the people they love and stop Deucalion from achieving his sinister goal.

Scott, Stiles and Allison suffer side effects from the ritual sacrifice; Sheriff Stilinski searches through old cases.

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

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.

Beacon Hills is under curfew from the power outage; the teens throw a blacklight Halloween party; Scott tries to earn Kira's trust.

Scott's friends pledge to protect him against an increasingly hostile enemy while Argent, Isaac and Allison search for answers through an old adversary from the Japanese Yakuza. At the same time, Stiles enlists Melissa's help in figuring out exactly what's going on with him.

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.

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.

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.

When Lydia goes missing from the hospital, werewolves and hunters begin a search.

Isaac's father is murdered; Scott, Stiles and Derek plan a break-out. At the same time, the Argent family remove the principal and Allison's grandfather replaces him. Scott senses that another werewolf is in the lacrosse locker room and plans to sniff them out, literally.

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.

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

As Lydia begins to make connections about the bite from Peter, Jackson causes new problems for Scott and Stiles while Derek has a crisis of faith in his leadership as a new Alpha.

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.

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.

When Scott suffers a werewolf bite, his strange new abilities begin to complicate his life - and his relationship with the new girl in town.

Scott struggles to balance his new life as a werewolf and the pressures of being a teen, all while avoiding werewolf hunters and trying to score a second date with Allison.

Scott and Allison end up in a group date; an animal attack has Stiles' sheriff father on the lookout.

A new hunter comes to town and shoots Derek, who is certain to die unless Scott can find the right kind of bullet that caused his injury.

There's another animal attack involving Lydia and Jackson, raising more questions about wild animals. Meanwhile, Scott and Allison skip school and Derek must deal with the werewolf hunters on his own.

Scott tries to control his transformation so he can spend more time with Allison. Elsewhere, Derek continues trying to make an ally of Scott.

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 moves to protect his friends from the Alpha, meanwhile Stiles makes a discovery about Derek's family.

While Derek is still stuck in captivity, Scott's true identity might become public information.

Caught in a war between hunters and werewolves, Scott seeks help from friends and enemies.

Scott meets with Stiles to find out that he's tracked down a werewolf expert who could help provide a cure.

Stiles convinces Scott that he's found an expert who could be the key to helping Scott.

Stiles and Scott come face-to-face with the lycanthropy expert and ask him for help.

Scott and Stiles break into the lycanthropy expert's house in search of answers.

Stiles and Scott, held at gunpoint, try to call the lycanthropy expert's bluff.

The lycanthropy expert teaches Scott and Stiles about the wolf moon and reveals the cure for those with the bite.

Take a journey back to the beginning of 'Teen Wolf' to see how one bite would forever change Scott's life.

A special half-hour after-show, “Teen Wolf Revelations,” will bring the series’ stars together on one stage to discuss the biggest moments from Season Two, share behind-the-scenes stories, and give never-before-seen glimpses into where they hope their characters will go from here. Viewers will also get a special advance look at the next episode entitled "Frenemy".

Interviews with the cast and crew about the second season finale and what's to come in season three.

A recap of the previous two seasons, with cast interviews, and the trailer for the third season.

The cast unite on-stage to discuss their characters and the third season.

An inside look at Tyler Posey’s life when he’s off set: from planning his wedding and facing his mom's struggle with breast cancer to re-connecting with old friends and riding motorcycles with his dad.

MTV looks back on Teen Wolf’s 10 most pivotal, heartbreaking, talked about, and OMG moments.

A look at the top ten fiercest female moments on Teen Wolf.

A look at the top fan favorite moments from Teen Wolf.