Bonnie is reunited with her estranged mother; Klaus negotiates with Stefan to control the coffins of his family members; Tyler tries to regain his free will; and Damon becomes intrigued by Alaric’s new friend, Dr. Fell.
Elena, Bonnie and Matt plan a surprise 18th birthday party for Caroline. Meanwhile, Damon and Stefan disagree over the best way to handle Klaus; and Alaric runs into Dr. Fell, who is in the middle of an argument with her ex-boyfriend
Rebekah opens up to Elena on the night of the homecoming dance. Meanwhile, Klaus puts his latest plan into action, but Damon enters into a dangerous partnership to stop him. My Morning Jacket perform.
Mystic Falls is invaded by spirits of the dead during the town’s Illumination Night, and Damon encounters an angry ghost with surprising power. Meanwhile, Elena persuades Jeremy to use his connection to the spirit world to help find Stefan.
Elena, Caroline, Bonnie and Matt begin their senior year of high school. Meanwhile, Damon becomes annoyed with a new houseguest, and everyone is surprised by a new arrival in Alaric’s history class.
Despite all that has happened, Caroline (Candice Accola) is determined to see that Elena (Nina Dobrev), Bonnie (Kat Graham), Matt (Zach Roerig) and Tyler (Michael Trevino) all enjoy a traditional Senior Prank Night before the school year begins at Mystic Falls High School.
Klaus contacts a witch from his past to see why his plan isn’t working. Meanwhile, Damon faces a new enemy and lashes out in a way that brings about lasting consequences; Jeremy makes a breakthrough with one of his ghostly visitors
Klaus and Stefan travel to Chicago, where Stefan is reunited with a vampire who was in love with him decades earlier. Meanwhile, Damon and Elena follow Stefan’s trail; and Tyler worries about Caroline and turns to her mom for help.
Klaus puts a plan in motion that will give him even more power, but even with the unwilling participation of werewolf Ray Sutton, things don’t go exactly as Klaus had planned.
The third season begins with Elena and Damon searching for Stefan, who is with Klaus tracking a werewolf. Meanwhile, Caroline plans a party for Elena’s 18th birthday, and Jeremy sees the ghosts of his late girlfriends Vicki and Anna.