A new Alpha Pack arrives to wreak Havoc on Scott's life while Derek and Isaac struggle to locate Erica and Boyd.

Allison and Lydia stumble upon a possible clue to finding boyd and Erica while a childhood friend of stiles goes missing.

Boyd and Cora are under the influence of the full moon; Scott and Derek seek help from an unliklely ally.

While Scott tries to keep Isaac from engaging in a deadly confrontation with the Twins, 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 h is friends flash back to the events of a pre-emptive strike against the Alphas, which has left several injurered and possibly one or more dead.

Scott and the others suffer strange experiences while stranded at a motel; considering the killer's newest targets.

The Darach targets Deaton as the next sacrfice, leaving him hanging by his wrists to die. The Alpha Pack attacks Derek while Scott saves Deaton, with the help of Sheriff Stilinski.

Seeking answers, Scott, Allison, Stiles and Cora hear stories told by two unlikely narrators and discover a secret about the colour of a werewolfs eyes, that they change from yellow to blue when an innocent life is taken.

Allison and Isaac learn that the Darach is planning to sacrifice guardians next, they think that her father is involved with the murders, but end up discovering that he has been tracking the Darach for a while now.

After Jennifer takes stiles' dad, Deek and Scott capture her and bring her to the hospital in order to save Cora's life, where they are trapped by the Alphas.

Scott must make a difficult choice to save friends and family; Derek and Peter contemplate a way to save Cora's life.

Scott and his friends use an ancient ritual to save the lives of their loved ones and stop Deucalion.

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.

William Barrow, an electrical engineer turned mass murderer, escapes during surgery and hides out in the school.

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; Argent, Isaac and Allison search for answers; Stiles may be the dark spirit the oni seek.

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. Stiles is still possessed by the Nogitsune.

Stilles has to make an important decision over Eichen house. Scott and his friends seek out an important Japanese artifact.

Kira Learns that her mother is actually a Kitsune who is close to 900 years old. During the second World War, she was in a japanese internment camp, and fell in love with a yound medic.

Scott and Lydia combine abilities in an attempt to gain the upper hand; Stillinski's future will be decided by a review board.

Kira finds herself facing an unexpected antagonist; Scott and his friends try to survive against an enemy growing ever stronger.

The Oni, under the control of the nogitsune, systematically and violently take control of the hospital, Sheriff's station, high school and Alan's animal clinic