Paramount's Teen Wolf series is famous for the cold and ruthless villains that tirelessly plagued Scott McCall's pack and the entire town of Beacon Hills. These villains were willing to do anything to achieve their goals, but some were more malicious than others, often going the extra mile in their plotting and scheming, with no regard for anyone around them.
Sometimes these plans were small and other times they were large, but without a doubt, these villains and their diabolical plots made the show a fan favorite. It is unclear just how many villains will return for the movie, but these are the ones ed for their unique brand of malice.
Matt Daehler
He portrayed himself as an innocent photographer and lacrosse player, but he was responsible for the death of Mr. Lahey, and the ongoing murders of the 2006 swim team of Beacon Hills High. As master of the Kinama (Jackson Whittmore), he killed many innocent people, including several Deputy Sheriffs.
Matt was not overtly cruel, but he was quite skilled at plotting and manipulating. He was able to hide his involvement in the murders for a long time and even harmed himself to keep the sheriff off his trail. Though his murders began as a righteous vendetta, he slowly evolved into a heartless villain, willing to do anything to get vengeance and cover his tracks.
The Desert Wolf
Corrinne, better known as The Desert Wolf was a small-time villain, but her actions were cruel enough to leave a mark on the audience. Angered by the loss of her Were-coyote powers to her daughter (Malia Tate) she tried to kill her twice, and one of these attempts led to the death of Malia's adopted mother and sister.
Corrinne was a heartless assassin and cold-blooded murderer who held no value for human life. Her plans did not have a massive effect on the heroes, but they definitely affected her daughter, who spent eight years living as a Coyote and struggled with the death of her adopted mother and sister. Corrinne might have played a small role, but she will always be ed as the mother who plotted to kill her daughter for power.
Peter Hale
Peter Hale was Teen Wolf's first villain, and he kickstarted most of the initial events in the series. After he recovered from the severe burns he suffered in the Hale house fire, he killed his niece (Laura Hale) and stole her Alpha power. In a bid to build a pack that'll do his bidding, he turned Scott into a Werewolf and activated Lydia's banshee powers. He was also behind the Deadpool hit list in season 4 and tried to steal Scott's Alpha powers.
Initially a selfish and careless opportunist, he was known for lying and manipulating others to achieve his ever-changing goals. His numerous plots were not always successful, but he never failed to cause damage to the heroes and create trouble in Beacon Hills. He eventually turned a new leaf, but his earlier schemes made him an unforgettable villain.
Kate Argent
Kate Argent was a power-hungry hunter and an unhinged fiend. A major antagonist for the entirety of the series, she was responsible for the fire that murdered the Hale family and burned Peter Hale, thereby triggering the events that spurred the entire series. She was killed at the end of season 1, but was unexpectedly revived as a Were-jaguar and continued scheming till the end.
Kate was obsessed with killing and torturing anything supernatural, but she quickly and hypocritically embraced the life of a supernatural when she was turned. Even though most of her plans were foiled throughout the series, she remained a thorn in the flesh of the heroes, deceiving, controlling, and killing others to achieve her aims.
Deucalion & The Alpha Pack
The arrival of Deucalion, the blind Alpha, and his Alpha Pack, was a game-changer. Deucalion wanted a pack of Alphas and he achieved his goals by killing of his original pack, convincing the others to do the same. He planned to create the perfect Alpha pack, one that included a true Alpha (Scott McCall) and he was ruthless in his pursuit.
Deucalion proved himself to be a conniving and intelligent villain when he killed Ennis, a member of his own pack, and framed Derek Hale for the murder. He did all this to destroy Scott's pack and almost succeeded in defeating the heroes. He started as a good guy, turned bad guy, and finally turned good guy again, but the plots of his villainous days make him one of the most dangerous villains in the series.
Julia Baccari
Julia Baccari, more commonly known by Jennifer Blake or The Darach, is a major antagonist in season 3 of Teen Wolf. After being disfigured and left for dead by Kali, a member of the Alpha Pack, Julia came up with a plan to get vengeance on Kali and the rest of the Alpha Pack.
She initially pretended to be a normal school teacher and cautiously executed her plans from the shadows. As the Darach, she performed a series of human sacrifices and killed a lot of innocent people to achieve her goals. The consequence of these sacrifices lingered for the entirety of the series and led to Allison Argent's sad and unexpected death. There is no doubt that Julia was a victim, and her decision to take vengeance could be justified, but willfully killing innocents showed that her plan was more evil than good.
Theo Raeken
Theo was a classmate of Scott and Stiles and was the first Chimera created by the Dread Doctors. He plotted to steal Scott's power and become the Alpha by befriending the of Scott's pack and turning them against Scott.
Although he eventually ed the heroes, he was definitely one of the most formidable villains they ever faced. He succeeded in tearing the pack apart, and almost killed Scott and Malia. Theo's villainy was properly masked behind his friendly demeanor and reassuring smile, and this made him one of the most diabolical villains in the series.
The Dread Doctors
The Dread Doctors were introduced in season 5. They experimented on teenagers, creating powerful supernatural beings known as Chimeras. They also performed procedures and experiments on several supernatural creatures, all in a bid to resurrect the world's perfect killer, the Beast of Gevaudan.
They were cold and emotionless, displaying nothing but blind loyalty to their mission and a murderous disregard for any experiment they deemed a failure. After countless horrible deaths and numerous complications, the Dread Doctors succeeded in resurrecting the Beast, leading to more deaths in Beacon Hills. Thankfully, their success was short-lived as the beast was killed by Scott, but the repercussions of their wicked schemes lingered until the end of the series.
Meredith Walker
She was first introduced as a patient in the Eichen house psychiatric facility, and she occasionally helped Lydia Martin, her fellow Banshee. It was later revealed that her innocent acts were a misdirection, and she was behind the Deadpool of supernatural persons/creatures in the show's season 4. Although she got the idea from Peter Hale, she saw to its meticulous execution.
During her reign as The Benefactor, Meredith manipulated and deceived the heroes, and she also included her name in the Deadpool list to avoid rousing any suspicions. She pretended to be a helpless bystander, but she was pulling the strings from behind the curtains. Her execution of the Deadpool led to the death of many Supernaturals and caused quite a stir in Beacon Hills.
Gerard Argent
Arguably one of the meanest old men on television, Gerard Argent was a well-trained hunter, who had a strong dislike for anything supernatural, but he was willing to become a Werewolf when he thought it would benefit him. Gerard was a conniving hypocrite and a sociopath who repeatedly murdered anyone that stood in his way.
As an opportunist and a manipulator, he constantly used his wealth of knowledge and experience to manipulate the people and the situations around him. Gerard was a power-hungry man who was willing to sacrifice his own children to get whatever he desired. Ultimately meeting his end at the hands of his daughter, he was definitely the most intelligent and memorable villain in the entire series.