Scott and his friends follow Dr. Valack's advice; and experience strange effects as a result.
Stiles tracks a fugitive; and Liam plays wingman for Mason at a nightclub.
Scott tracks a new shapeshifter that's threatening Stilinski; and Malia receives information about her mother.
The school is under quarantine when a deadly virus hits it; Meanwhile, Braeden is shot.
While Roman and Emery keep their relationship a secret, Emery and others are permitted into the Sector to celebrate an Atrian family holiday. Julia must fight to keep her healing a secret when she is approached by Ms. Benton. Drake is reunited with someone from his past.moreless
Roman discovers that his father was using a cell phone to communicate with someone outside the sector. Emery supports Sophia joining the Marshall High swim team while trying to discover what Julia and Roman are hiding from her.moreless
Emery seeks to comfort Roman after his father's death. Meanwhile, Roman decides to accept his father's leadership role among the Atrians and must protect Emery when she becomes the target of a hostile group of Atrians known as the Trags.moreless
When Emery was 6 years old she met an alien boy Atrian of her same age, before he was taken away by the authorities. Ten years later later they meet again in High School and they are immediately drawn together but there are other forces trying to keep them apart.moreless
After realising that Stiles is not himself, Scott and the group try to figure out how to get the real Stiles back to prevent a disaster from happening.
After last weeks previous episode of Kira's abduction, the teens decide to throw a black light party. At the same time, things are coming from the Shadows. Who are they? Why do their eyes glow yellow? Why do they wear masks? And how did Kira survive being electrocuted. Stay tuned...moreless
While Peter and Derek try to save Cora's life in the aftermath of the storm, Stiles works frantically on a plan to prevent his father and Scott's mother from becoming Darach's next victims. Ultimately, there's a difficult choice to be made that could endanger everyone's lives and change them forever.moreless
Moretti questions why Pierce is working a case without her after he accepts an invitation from a renowned environmental activist. The case involves a chain of abnormal neurological reactions, but Pierce's examination of the group of young girls involved uncovers a dark secret.moreless
Infamous serial killer Joe Caroll has escaped from prison and Ryan Hardy, the FBI agent who had him arrested, is called in to help the police try and find him. But Ryan soon learns that Caroll has made himself a number of followers over the internet as part of a huge game he has planned for Ryan.moreless
Mystic Falls holds a winter-theme party but chaos brews when Stefan and Caroline disagree with Tyler's plans for Klaus and the hybrids. Klaus makes a discovery that leads to violence. At the Gilbert lake house, Elena and Damon join with Bonnie and Professor Shane to help Jeremy conquer his inner demons. Professor Shane tells them a piece of ancient history that leaves them stunned.moreless
Caroline tries to support Stefan and Elena during a challenging time in their relationship, and Damon works to convince Stefan to help him discover Professor Shane's motives. Stefan, however, is busy executing a different plan with Klaus. At the annual Miss Mystic Falls Pageant, Elena and Caroline help April decide which dress to wear. Tyler and Hayley team upon a secret project, and Damon confronts Prof. Shane with his suspicions. Jeremy, becoming more concerned by the violent nightmares he's been experiencing, reaches out to Matt for help, but the situation quickly escalates.moreless
Connor continues to investigate the secrets of Mystic Falls and tries to recruit Jeremy to help him. Damon and Klaus enlist Dr. Fell's help to question Connor, but the situation takes a deadly turn. Elena turns to Matt and Caroline for support as she tries to maintain some normalcy in her life and continue her senior year at Mystic Falls High. Elena struggles to control her anger when Rebekah show up at school, but she learns that confronting Rebekah can be extremely dangerous. Later, Rebekah is feeling lonely and reaches out to April. Stefan tries to show Elena that her life can still be fun by taking Elena on a wild motorcycle ride. Tyler receives a surprise visit from Hayley, a werewolf who helped him break his sire-bond to Klaus. Stefan turns to a Caroline for advice as he worries about Elena and his own emotions.moreless
Elena struggles to cope with the emotional swings as she becomes a vampire, and Stefan and Damon nearly come to blows while arguing about what is best for her. Damon comes up with his own plan to help Elena asks her to to reveal the plan to Stefan. A stranger, Connor Jordan, shows up in Mystic Falls and starts asking questions of Sheriff Forbes and Mayor Lockwood, and Stefan quickly decides that Connor must be a vampire hunter. Jeremy and Matt are surprised when April, a girl from their past, returns to town and enrolls at Mystic Falls High. At a town gathering, Elena nearly loses control, but Caroline steps in and comes to her rescue. Finally, Damon reveals his true feelings to an unexpected friend.moreless
Elena wakes up the morning after the accident to discover that her greatest fear has come true: she died with vampire blood in her system and must now decide whether to suffer through the terrible transition to become a vampire or face death. Stefan promises Elena that he and Bonnie will explore every possible solution to her predicament, but Damon is furious with Stefan for saving Matt instead of Elena. Bonnie faces extreme consequences after attempting to help Elena, and Damon focuses his frustration and anger on Matt. In a rare moment of empathy, Rebekah is touched by Stefan and Elena's love for one another. Pastor Young and the Town Council members start to round up the vampires and their supporters, but their efforts lead to a surprising tragedy.moreless
The shape-shifter continues his murders while Scott tries to get Allison to retrieve a rare book in Gerard's collection
Jeremy makes an important decision that will change everything as he tries to protect Elena. Facing the harsh reality of her present situation, Elena longs for simpler times when her parents, Grayson and Miranda, and Aunt Jenna were still alive and her only concern was her relationship with Matt. Damon and Stefan leave Mystic Falls together on a mission, but soon part ways when Elena needs help from one of them. Caroline and Tyler face a life-changing decision, and Bonnie makes a secret deal that has tragic consequences.moreless
Klaus tries to carry out his plan to leave town with Elena, but meets resistance from an unexpected new enemy. Bonnie turns to Abby for help with a particularly difficult spell. As things spiral out of control, Elena is determined to make sure that Caroline is safe. Damon and Stefan turn to Tyler for help, and Bonnie and Jeremy take a dangerous risk to make sure that her spell is effective. Damon and Stefan have a surprisingly candid conversation about the future.moreless
Back in present day Mystic Falls, Damon reunites with Sage a century after their first meeting. During the kick off ceremony for the restoration of Wickery Bridge, Damon is surprised to discover the reason Sage has returned. Meanwhile, Abby is having trouble coping with her new reality, even with Caroline and Bonnie doing their best to aid her transition.moreless
The murders in Mystic Falls get Damon thinking back to a similar crime spree one hundred years ago. Through flashbacks to 1912, Damon remembers a beautiful vampire named Sage who opened him up to a whole new way of life. Sheriff Forbes warns Damon not to get involved in the murder investigation, but Damon is convinced she's pursuing the wrong suspect. In their effort to prove that Dr. Fell is the murderer, Elena and Matt resort to breaking and entering as they search evidence. For reasons that only Rebekah understands, she starts asking questions about the location of one of Mystic Falls' oldest landmarks. Elena comes to a new realization about the direction her life has taken, and Damon makes an emotional confession to Stefan.moreless
Damon and Stefan accompany Elena to a formal ball being hosted at Klaus's newly renovated mansion. Meanwhile, Caroline and Matt also receive invitations. While at the party, Elena discovers a plan that could lead to numerous deaths, and she must choose whom to trust with the information. Klaus shows a different side of himself to Caroline. As the evening ends in violence, it's Damon who must find a way to cope.moreless
Elena, Bonnie and Matt throw a surprise party for Caroline's 18th birthday. When Stefan and Damon can't agree on how to deal with Klaus, Stefan decides to test out his plan. Elena tells Bonnie that Jeremy's leaving town. Alaric runs into Dr. Fell at a Founder's meeting. Tyler is surprised when Klaus doesn't object at his refusal to go along with Klaus' latest demand.moreless
As the town prepares to celebrate the traditional Illumination Night, spirits of the dead invade Mystic Falls. After a brutal attack by an angry spirit, Damon asks Bonnie to determine the source of the ghosts' surprising power. Elena talks Jeremy into using his connection to the other side to help her explore new ways to reach Stefan, but Jeremy makes a terrible decision. Meanwhile, Alaric discovers a long-hidden clue that gives him new insight about the past.moreless
Klaus contacts Chicago witch Gloria to help him find the reasons why his plan isn't working as he expected. Gloria, though able to see glimpses of the puzzle, needs Stefan's help to piece it all together. Damon is pushed to his limits by a new enemy in Mystic Falls with far reaching effects. Even while helping Elena confront her feelings, Caroline tries to cope with her own emotions. Jeremy is left extremely confused after a dramatic and important discovery with one of his ghosts. But it's an unexpected meeting involving Bonnie that will touch everyone's lives.moreless
Klaus attempts to execute a plan that will give him even more power, but things don't go as he planned. Alaric and Damon hesitantly go along with Elena's search for Stefan, but her plan may end up putting Damon in danger. Jeremy asks for Matt's help to find out what his ghosts want from him, and Caroline needs Tyler's help.moreless