S3-E2:The Hybrid: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.
S3-E3:The End of The Affair:While in Chicago with Klaus, Stefan runs into a vampire from his past, someone still interested in him after decades. In a flashback to 1920s Chicago, Stefan recalls a troubling chapter in his life. Following a tip, Damon and Elena follow the trail of Stefan and Klaus. Wondering what's happened to Caroline, Tyler asks Sheriff Forbes for help.
S3-E4:Disturbing Behavior: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.
S3-E5:The Reckoning:Elena, Bonnie, Matt and Tyler decide to oblige Caroline when she urges them to celebrate Senior Prank Night, but uninvited guests make for a deadly evening. Damon convinces Jeremy that his connection to the other side may be the way to defeat Klaus. Klaus uses Stefan for more dangerous and brutal intentions.
S3-E6:Smells Like Teen Spirit:On the first day of their senior year, Elena, Matt, Bonnie, and Caroline are still dealing with the recent events, yet Tyler seems to be enjoying his new reality a little too much. Damon is frustrated by the new guest in his house, and everyone is caught off guard when a new student joins Alaric's history class. Matt looks to Bonnie for help after realizing that he made a big mistake. Meanwhile, Stefan continues to follow Klaus's orders and carry out his latest assignment.
S3-E7:Ghost World: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.
S3-E8:Ordinary People:Elena and Bonnie help Alaric in his effort to decipher the meaning behind his recent discovery. Elena and Rebekah find themselves in a mean-girl power struggle until Rebekah finally reveals some of her family's ancient secrets and her violent past with Klaus and Elijah. Still trying to make a breakthrough with Stefan, Damon tries a reckless new approach, and they're both surprised by an unlikely ally.
S3-E9:Homecoming:Elena is uneasy and confused after Rebekah tells her why the night of the Homecoming dance is so significant. Tyler's actions during the evening leave Matt and Caroline shaken. Things turn bizarre when Klaus decides to activate his latest plan and, while trying to outsmart him, Damon forms a risky liaison which gives rise to a horrifying unforeseen development.
S3-E10:The New Deal:Because Stefan has hidden the coffins containing the bodies of Klaus' family, Klaus threatens violence to convince Damon and Elena that no one will be safe until he finds Stefan and gets his family back. Tyler continues to take advantage of his new hybrid powers, but he must also deal with unsettling consequences of his actions. After a terrifying incident, Elena and Alaric become concerned about Jeremy's attitude and his safety. Alaric meets Dr. Fell, who is intrigued with his impressive ability to heal. While trying to work out a deal with Klaus, Elena gives him some news that truly surprises him.
S3-E11:Our Town: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.
S3-E12:The Ties That Bind:Bonnie believes her dreams she's been having about Klaus's coffins will help her figure out how he can be killed. The recurring dreams also lead Bonnie to a reunion with her mother, Abby, whom Bonnie hasn't seen for 15 years. When they visit Abby's farmhouse, Bonnie and Elena meet Jamie, a young man Abby took in years earlier. Though Bonnie's sudden appearance catches Abby off-guard, she does her best to explain the past. Tyler turns to an unexpected ally as he works to regain his free will. Damon is intrigued by Dr. Fell, and Klaus and Stefan continue their violent negotiations over control of the coffins containing Klaus's family members.
S3-E13:Bringing Out The Dead:Sheriff Forbes delivers some unsettling news to Alaric and Elena about the murder weapon used in a recent killing. In Damon and Stefan's ongoing mission to kill Klaus, Stefan turns to Bonnie and Abby for help, and Damon seeks out to an old acquaintance to help him put together an elaborate plan. With a plan of his own, Klaus hosts an unusual dinner party, where he reveals another story from his family's violent history, but a surprise visitor brings the party to an abrupt end. Meanwhile, Caroline's heart is broken when she is unable to prevent a tragedy.
S3-E14:Dangerous Liaisons: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.
S3-E15:All My Children:Elena, already upset after learning of Damon's latest indiscretion, is frustrated when none of her friends agree with her on how to handle the Original family's power struggle. Bonnie and Abby, still entangled in the destiny of the Bennett witches, participate in a ritual to appease the spirits of nature. Elijah presents Damon and Stefan with a dangerous ultimatum that puts Elena's life in danger, forcing Damon and Stefan to seek help from Alaric and Meredith with a plan that leads them to a terrifying option.
S3-E16:1912: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.
S3-E17:Break On Through: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.
S3-E18:The Murder Of One:Damon and Stefan work on a new mission with the hope of bringing down Klaus, and they enlist the help of Caroline, Matt, and Elena. Bonnie is forced to help Klaus with a spell after he threatens someone important to her. Meanwhile, Klaus and Rebekah find a way to convince Finn to help them, but Rebekah is focused on her own plan to exact revenge on Damon. Stefan's emotions lead to a dangerous confrontation with Klaus and, later, to a heartbreaking moment with Elena.
S3-E19:Heart Of Darkness:Elena and Damon travel to Denver to check in on Jeremy and to see if his special abilities can help them track down the information they need about the ancient vampire bloodlines. When they arrive, they quickly realize that Jeremy has been hanging around a bad crowd. Meanwhile, Stefan and Klaus both go to extreme measures as they try to find the missing weapon. Caroline is ecstatic when Tyler returns to Mystic Falls, but he quickly starts to suspect that something has been going on between Caroline and Klaus. Matt stays busy trying to keep Rebecca focused on organizing the school's upcoming 1920s Decade Dance.
S3-E20:Do Not Go Gentle:Alaric receives guidance from someone unexpected as he navigates his dangerous new path, while Damon and Meredith try to determine the best course of action. At the school's 1920s Decade Dance, Bonnie invites Jamie to the 1920s Decade Dance, and Caroline convinces Elena to ask Stefan to be join her. Caroline is pleased to see Tyler show up at the dance and try to sweep her off her feet, but Klaus does everything he can to come between them. Things take a dangerous turn at the dance, and Stefan and Damon turn to Jeremy, Matt, and Bonnie to help reverse a spell that threatens everyone.
S3-E21:Before Sunset: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.
S3-E22:The Departed: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.