Caroline is thrilled when Tyler returns to town, but Tyler soon suspects that something has been going on between Caroline and Klaus.
Stefan's emotional turmoil leads him to a dangerous confrontation with Klaus and, later, to a heartbreaking moment with Elena.
Damon is surprised to learn why Sage has returned, and pleased when she devises an unusual method to help him figure out what Rebekah is up to.
Present-day murders in Mystic Falls remind Damon of a similar crime spree a century earlier. Flashing back to 1912, he recalls a beautiful vampire.
When Elijah gives Damon and Stefan a dangerous ultimatum that puts Elena in danger, they turn to Alaric and Meredith for help.
Elena is invited to a formal ball at Klaus's mansion and discovers a horrifying and deadly plan. Who can she trust with her new information?
Sheriff Forbes delivers disturbing news to Alaric and Elena about a recent murder weapon. Caroline is heartbroken when she's unable to stop a tragedy.
Bonnie's recurring dreams about Klaus's coffins lead her to a reunion with her mother, Abby, whom Bonnie hasn't seen in 15 years.
Elena, Bonnie and Matt surprise Caroline with a small party for her 18th birthday. Tyler refuses to go along with Klaus's latest demand.
Klaus uses violence to convince Damon and Elena that no one will be safe until he finds Stefan and gets his family back.
On the night of the homecoming dance, Rebekah tells Elena why the evening is so important to her, leaving Elena with conflicting emotions.
Elena and Rebekah engage in a power struggle, until Rebekah reveals some of her family's ancient secrets and the violent past she shares with Klaus.
Preparing to celebrate Illumination Night, Mystic Falls is invaded by spirits. After an encounter with an angry spirit, Damon asks Bonnie for help.
As senior year begins, Elena, Caroline, Bonnie and Matt are reeling from recent events, while Stefan carries out his latest assignment from Klaus.
A traditional Senior Prank Night before the school year begins takes a deadly turn.
A frustrating new enemy pushes Damon over the edge, and his outburst has lasting consequences. Bonnie's strange encounter affects everyone.
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