Reeling from the death of her parents, 17-year-old Elena becomes interested in a handsome new student named Stefan, who's hiding a dark secret.

Elena goes to the Salvatore house to talk to Stefan, but finds Damon there instead, who reveals surprising information about Stefan's past. Vicki begins to remember the attack.

Elena invites Stefan and Bonnie to dinner, hoping that the two will bond, but the evening is disrupted by the unexpected and unwelcome arrival of Damon and Caroline.

Stefan escorts Elena to the town's Founder's Party. At the party, Damon tells Elena a story about the Salvatore family, leaving Elena with questions Stefan refuses to answer.

Stefan is hopeful of his plan to get rid of Damon, and decides to reveal parts of his past to Elena. Bonnie seeks advice from her grandmother (Jasmine Guy - A Different World).

In flashbacks, Stefan reveals to Elena the Salvatore family history, including how his rivalry with Damon began. In the present, Damon impulsively takes control of Vicki's future.

Bonnie's abilities surprise Damon. Elena asks Jeremy not to see Vicki. Matt takes Vicki to the high school Halloween dance, but the night takes a terrifying turn.

Stefen gets a surprise visit from old friend Lexi. Caroline tries to get Damon's Medallion back from Bonnie.

Jeremy gets a break from the mysterious new history teacher, Alaric Saltzman (Matt Davis - Blue Crush). Damon reveals to Stefan the stunning reason he returned to Mystic Falls.

When Sheriff Forbes tells Damon of another attack, he offers to track down the killer, learning startling information about the town's founding families.

Damon goes to Georgia to suprise an old flame, Bree (Gina Torres - Standoff, Firefly), and enlist her help. Meanwhile, Stefan uncovers a startling clue to the past.

The Mystic Grill's Ben (Sean Faris) comes to Bonnie's aid. Damon and Stefan accompany Elena to a school dance with a 1950s theme. Alaric (Matt Davis) introduces himself to Damon

Stefan and Damon recall the incidents that led to the rift in their relationship.

Jeremy asks Anna (Malse Jow) to a party in the woods. Stefan, Damon and Elena work with Bonnie and Grams (Jasmine Guy) to open the tomb, and are shocked by what they discover.

Recurring guest star Melinda Clarke appears as Kelly, Matt's long-lost mother. Sheriff Forbes (Marguerite Macintrye) asks Damon to be part of a fundraising bachelor auction.

Anna (Malse Jow) brings a surprising guest to pay a visit to Damon. Elena and Stefan go on an awkward date with Caroline and Matt. Melinda Clarke appears as Kelly.

Stefan is forced to make a frightening decision. Matt is hopeful that his mom, Kelly (Melinda Clarke), will stay. And, after Caroline's car breaks down in a storm, she makes a horrific discovery that shocks everyone in town.

Stefan displays a rare party attitude and Damon's attempt to find out why Elena's uncle, John Gilbert (David Anders - Alias, 24) has returned to town an ugly turn.

Elena and Caroline compete in a beauty pageant. Spencer Locke appears as one of the contestants. John Gilbert tries to scare Damon

Elena learns what happened when Damon and Stefan were turned. Pearl has an ugly confrontation with John Gilbert. Jeremy and Anna get closer.

Isobel returns to town and stuns Alaric with her attitude and her demands that he arrange a meeting with Elena.

Damon and Alaric try to stop John Gilbert from setting a plan in motion to bring Founder's Day to an end amid chaos, destruction and death.

Elena comes home to a nightmare; Damon realizes Katherine has returned; Tyler receives a surprise visit from his uncle.

When a confused and desperate Caroline leaves the hospital and joins her friends at the Mystic Falls Carnival, Damon wants to take immediate action.

Elena, Damon and Alaric go to Duke University to find Isobel's research into the paranormal and look for clues to the mystery surrounding the Lockwood family; Stefan faces a new danger in the woods; Tyler makes a shocking discovery about Mason.

Katherine recalls the past.

Tyler learns more about the Lockwood family curse from Mason, and Sheriff Forbes receives startling information.

Katherine chooses a new victim. Bonnie discovers new information about Mason and shares it with Stefan.

Stefan and Damon decide on a new plan to deal with Katherine at the masquerade ball.

Stefan and Damon come to Elena's assistance and, in the process, learn surprising new information.

Elena puts herself in a dangerous position as she searches for the truth about Katherine's past and what her own future may hold. Knowing that Stefan would never agree to her plan, Elena swears Caroline to secrecy. Damon uses a new-found confidant to help him try to discover the real purpose and power of the moonstone. Jeremy and Bonnie meet Luka, a new student with a surprising family history.

Elena decides to take matters into her own hands and offers a tempting incentive to Rose for her help. When things take an unexpected turn, however, Rose calls on Damon to deal with the plan Elena has set in motion. Jeremy's reckless attempt to help Bonnie retrieve the moonstone lands him in a life-threatening position and forces Stefan to put himself in danger. Bonnie and Luka form a closer connection. Tyler shows Caroline the Lockwood cellar, where she makes a discovery that leaves them both terrified.

As the full moon nears, Caroline helps Tyler prepare for his transformation. Meanwhile, Damon and Alaric are suspicious when a stranger shows up looking for Mason.

While Damon tries to get the truth out of Jules, he asks Elena to keep an eye on Rose, a situation that turns unexpectedly dangerous.

Johnathan Gilbert's return to Mystic Falls is an unhappy surprise to Elena, Jenna and Damon. Stefan does his best to reach out to a confused Tyler.

Stefan and Elena attempt a romantic weekend getaway, not realizing that they've been followed. Damon attends a tea at the Historical Society.

Stefan tells Elena about his darkest days. Trying to catch Elijah off guard, Damon arranges a dinner party.

Katherine's mind games cause everyone frustration, but Elena, Stefan and Damon realise that her knowledge of Mystic Falls' history could be crucial to their survival.

Isobel unexpectedly returns, leaving Jenna devastated. Bonnie attempts to harness her ancestors' power. Stefan and Damon realise that they have a new weapon.

As the students get ready for a 1960s-themed dance at the school, Elena begins receiving disturbing messages from the ancient vampire Klaus from an unusual source.

Stefan and Damon are angry when they find out that Elena has taken matters into her own hands in the battle against Klaus. Tensions also rise between the brothers over the best way to protect her.

Damon reveals that he is willing to go to incredible lengths to protect Elena from falling victim to Klaus's plans. Stefan and Elena spend a romantic day together.

Despite an unanticipated act of courage, events spin out of control in a frightening way.

Lives hang in the balance as the consequences of the sacrifice ritual play out.

It's Elena's 18th birthday, and as she searches for Stefan, Damon tries to keep her from doing anything that might draw Klaus's attention.

Damon and Alaric reluctantly go along with Elena's new strategy to find Stefan, leading Damon into a dangerous fight with an unexpected enemy.

Klaus takes Stefan to Chicago, where he wants to resuscitate his sister Rebekah, who might hold the key to breaking the curse. Gradually, Stefan is reminded of his Prohibition period affair with her while still bloodthirsty himself, and its tragic end. Tyler is rightly worried, turning for an ally to her mother sheriff Forbes, about the whereabouts of Caroline, whose bully father Bill actually holds her in a dungeon for 'vampire aversion therapy' of the most flagrant kind. Katherine puts Damon on feared Klaus's trail, so he can mount a rescue with Elena after putting her in her place.

In Chicago, Katherine meets Stefan in front of a store and she tells that Elena has the necklace that belongs to Rebekah. She also feels that Stefan is plotting a scheme against Klaus, but he does not share his plan with her. Meanwhile, in Mystic Falls, Anna shows up to Jeremy and talks to him that she is alone in the afterlife. Gloria seeks out the necklace using a spell while Bonnie and Caroline visit Elena; out of the blue, her necklace burns her chest. Damon is upset with people trying to change him to be Mr. Nice Guy. Sheriff Forbes asks him to compel Bill to forget everything but Bill resists. When Damon decides to kill Bill, Caroline protects her father. Meanwhile Gloria tortures Stefan to discover who is wearing the necklace but Katherine unexpectedly kills the witch. Stefan discovers that Klaus fears a vampire hunter, Mikael, and tries to get more information from Rebekah. She's suspicious of his attitude and tells this to Klaus, who decides to return to Mystic Falls.

Despite all that has happened, Caroline is determined to see that Elena, Bonnie, Matt and Tyler all enjoy a traditional Senior Prank Night before the school year begins at Mystic Falls High School. However, when uninvited guests show up, it doesn't take long for the evening to take a deadly turn. Damon convinces Jeremy that he can use his new connection to the other side to help find a way to defeat Klaus. Finally, Klaus deepens his hold on Stefan and uses him for increasingly violent and dangerous purposes.

Elena meets Stefan at the high school and he tells that he is watching her following Klaus's order. Rebekah, who is staying at the Salvatore's house, is in the same class as Elena. Elena plots with Alaric and Damon to lock Stefan in the dungeon of the Salvatore house. Tyler is fascinated and reveling in his sire bond to Klaus. Vicki convinces Matt to bring her back from the dead. Anna tells to Jeremy that darkness is surrounding Vicki, and that she has made a pact with the Original Witch. Vicki hits Matt on the head and seeks out Elena as part of her agreement with the witch. Meanwhile, Damon stays with Rebekah while Elena and Alaric abduct Stefan. Katherine awakens Mikael who confesses that he does not drink human blood, he instead feeds on vampires.

On the day of the Night of the Illumination in Mystic Falls, Mason ties Damon to a chair and the vampire believes that it is a prank of his brother Stephan. Later Mason tells that he is seeking redemption and wants to destroy Klaus to help Tyler. He goes with Damon to a cave with tunnels where it is supposed to have a weapon to destroy the Original Vampire. Elena asks Jeremy whether he may contact Lexi to learn how she can bring humanity back to Stephan, but her brother explains that he has no connection with Lexi. Bonnie goes with Caroline to the place where the witches were burnt and she casts a spell from the Grimoire to bring the dead back. Her grandmother Sheila returns and tells that she must close the passage, destroying the necklace, since the Original Witch is sending every ghost that still has pending business back to Mystic Falls. Meanwhile, the vampires from the tomb also return seeking revenge. Lexi contacts Elena and she starts Stephan's "treatment". Caroline does not find the necklace on the place that Damon told her that it would be and she suspects that Anna has stolen it. Damon can not go ahead through the tunnel that is protected and Mason goes alone. Anna returns the necklace to Jeremy and Bonnie casts a spell; Lexi, Mason, Anna and her mother, the vampires from the tomb and Sheila vanishes.

Damon, Alaric and Elena reach a hidden cage in the secret tunnel beneath the Lockwood mansion. Alaric studies the runes and primitive pictures, which indicate it was the home of an ancient Viking family, who interacted with the Original werewolf, vampires and witch. They confront Rebekah, who is shocked to tie it up with her memories of her family's youth, when their father Mikael, now the only hunter they truly dread, bullied his sons, especially Niklaus, leading in interaction with the originally friendly werewolf neighbors to family drama and the origin of vampires. After taunting Stefan, Damon releases him from Lexi's 'aversion therapy' and takes him along to seek Mikael's help. Alaric and Elena work out that Rebekah's memories don't take account of a last, crucial cruel twist.

The homecoming dance becomes the backdrop for a battle of lethal wits between Damon's party, including Mikael and Rebekah although not at all reconciled, and Klaus's, which fields the hybrids by diverting the party to the Lockwood mansion. Tyler surprises Caroline by stating he doesn't really mind being under Klaus's spell as hybrid, it's not worse than monthly lunatic agony as pure werewolf. Fearing even with the eternal oak stake in Mikael's hand Klaus may outsmart them, Damon secretly enlisted Katherine, but Klaus prepared the most stunning surprise.

Bonnie has weird dreams with four coffins. Jeremy hangs around with Tyler and invites him in his house. Stephan meets Bonnie and asks her to hide the coffins of Klaus's family. Klaus tries to force Damon and Elena to seek out Stephan and compels Jeremy to stand up in front of a pick-up driven by a hybrid in high speed without his ring; however Alaric saves him but has difficulties to recover. Jeremy kills the hybrid and he takes Alaric to the hospital with Elena. Damon meets Stephan and he tells that he saved Klaus to save Damon's life. Then Damon asks to participate in Stephan's plan against Klaus. Stephan accepts provided Elena does not know the plan. Elena makes a deal with Klaus and delivers Rebekah to him. Then she asks Damon to compel his brother to leave Mystic Falls.

Bonnie tries to open the coffin and overhears something, but Damon and Stephan arrive in the house and Damon kills the hybrid. Elena and Bonnie are preparing a birthday party for Caroline at school and Jeremy says goodbye for them. Tyler meets Caroline to tell that he would never hurt her since he loves her, but Klaus controls him. Stephan threatens Klaus and asks him to send his hybrids out of Mystic Falls and beheads one hybrid in front of Klaus to prove that he is not kidding. Klaus summons Tyler and compels him to bite Caroline, but Tyler reacts telling that he will not hurt Caroline. When Caroline arrives home, Elena, Bonnie and Matt are waiting for her; however they go to a tomb to celebrate her funeral instead. Out of the blue, Tyler appears and bites Caroline on the neck. Damon and Alaric go to a counsel meeting to raise fund to rebuild a bridge and Damon meets Klaus that tells that Stephan must stop beheading his hybrids. Meanwhile Alaric flirts with Dr. Meredith Fell and protects her against her ex-boyfriend and coroner Dr. Brian Walters. Damon unsuccessfully tries to stop Stephan from killing hybrids. Stephan abducts Elena, calls Klaus, gives her blood to her and promises to kill her, driving his car in high-speed. Klaus agrees to send the hybrids away. Klaus goes to Caroline's home and gives his blood to Caroline and saves her. Damon brings Elena home and on the next morning Jeremy travels to Denver. Alaric meets Dr. Fell while Sheriff Forbes finds Brian murdered.

Prophetic dreams about the mysterious fourth coffin lead Bonnie and Elena to a surprising source, while Tyler seeks help to break free from Klaus' bond so he can be with Caroline. Alaric's new friend Dr. Fell has a secret no one sees coming, and Stefan's interference in Elena's life reveals something that surprises even him.

Now Klaus has Elijah back, they host a dinner party to negotiate a future with the Salvatore brothers, who actually procrastinate. Meanwhile combined witchcraft finally opens the mystery coffin, from which a scary surprise guest is released, but both families will be shocked. Alaric has been wounded dangerously by lover Dr. Fell, who happens to be supernatural, which makes saving him problematic, but Elena steps up. Caroline's father Bill Forbes refuses to survive his vampire bite by allowing Caroline to turn him into one like her.

Now Klaus's original family's coffins are open, he's supplanted as family head by their sorceress-maker, mother Esther, who holds a grand ball in their splendidly restored mansion. Invitations with gifts and where needed other persuades go to the Salavtore brothers, Alaric, Matt, Caroline and especially Elena, who is asked for a private meeting. After Stefan prevents Damon from stopping her, she learns that Esther, aided by son Finn, needs Doppleganger blood to put a fatal spell on her children, the others being an 'abomination' except Elijah, firstly binding their fate. Tyler prepares his return.

After starting her day with a startling discovery of Damons' latest indiscretion, Elena is frustrated to find that none of her friends agree with her on how they should react to the Original family's internal power struggle. Once again caught up in the destiny of the Bennett witches, Bonnie and Abby find themselves playing a part in a ritual to appease the spirits of nature. When Elijah gives Damon and Stefan a dangerous ultimatum that puts Elena in danger, they turn to Alaric and Meredith for help with a plan that leads them to a terrible choice.

The present-day murders in Mystic Falls remind Damon of a similar crime spree a century earlier. Flashing back to 1912, Damon recalls a beautiful vampire.

Stefan still struggles desperately to get his blood-lust back under control. Damon keeps an eye on him, but has other priorities. Damon's former teacher Sage returns as his lover, in a secret pact against Rebekah, whom he seduces to keep an eye on her quest for the original white oak's sole known shoot. The old vampires are actually in league and torch the bridge made from its wood, fearing the weapon that could be made from it, but Damon stayed a step ahead. Dr. Fell tries to treat Alaric medically while Bonnie attempts to undo the curse which caused his hereditary madness, but they aren't careful enough, so Damon must intervene. Jeremy calls home from Denver, reporting that he only suffers from melancholy, but is doing well at school.

Stefan's emotional turmoil leads him to a dangerous confrontation with Klaus and, later to a heartbreaking moment with Elena. Claire Holt and Casper Zafer guest star

Caroline is thrilled when Tyler returns to town, but Tyler soon suspects that something has been going on between Caroline and Klaus. Matt tries to keep Rebekah (Claire Holt) busy.

The 1920s Decade Dance takes a deadly turn when Damon and Stefan realize they need the help of Matt, Jeremy and Bonnie to undo a spell that could be devastating for everyone.

Klaus acts on his intentions to leave town with Elena, but finds resistance from a surprising new enemy. Damon and Stefan have a surprisingly candid conversation about the future.

Determined to protect his sister, Jeremy makes a decision that will change everything; Bonnie makes a secret deal that has heartbreaking consequences.

In the fourth season premiere, Elena awakens after the accident to find the thing she dreaded most has come true. Damon is furious with Stefan, and takes out his rage on Matt.

Stefan and Damon argue about what is best for Elena. Jeremy and Matt are surprised to see a girl they used to know, April (GRACE PHIPPS), enrolling at Mystic Falls High.

Elena learns confronting Rebekah (CLAIRE HOLT) can be dangerous. Tyler gets a surprise visit from Hayley (PHOEBE TONKIN - The Secret Circle), a werewolf who helped him with Klaus.

At a fraternity costume party, Damon gives Elena a lesson in choosing a victim. Klaus reveals an encounter with a group of vampire hunters - flashing back to 12th century Italy.

Stefan and Klaus form an uneasy alliance to try and contain the danger that Connor (TODD WILLIAMS) has unleashed. Professor Shane (DAVID ALPAY) works with Bonnie.

Terrifying hallucinations leave Elena shaken and confused and she makes a painful confession to Stefan. Matt gives Damon startling information about Professor Shane (DAVID ALPAY).

At the annual Miss Mystic Falls Pageant, Elena and Caroline give April (GRACE PHIPPS) advice, while Tyler and Hayley (PHOEBE TONKIN) work together on a secret project.

Damon and Stefan visit New Orleans in hopes of finding someone who remembers their last visit in 1942. MADELINE ZIMA (Californication) guest stars as one of Damon's former flames.

It's a winter wonderland in Mystic Falls. Plus, Professor Shane (DAVID ALPAY) reveals a piece of ancient history that leaves everyone speechless.

Rebekah (CLAIRE HOLT) is back with a vengeance. Bonnie is uncomfortable when her father, Rudy Hopkins (RICK WORTHY - Supernatural), accepts the role of Interim Mayor.

Jeremy is furious when Klaus tries to control him by putting Matt's life in danger. Damon coaches Jeremy as he prepares to take on Klaus' new vampires, but they find that Kol has beaten them to it. Kol makes it clear that he will stop at nothing to convince everyone to give up the search for the cure. Looking for a new ally, Rebekah reminds Stefan that they were once close friends. When Sheriff Forbes and Mayor Hopkins question Shane about his involvement in the Founders' Council deaths, Bonnie steps in with questions of her own, and Shane's responses push Bonnie to the edge of her powers. Elena negotiates with Klaus to keep Jeremy safe, but when danger suddenly appears from a totally unexpected enemy, Elena comes up with her own daring plan for Jeremy.

When the 1980s Decade Dance at the high school is cancelled by Mayor Hopkins (RICK WORTHY), Stefan finds a charming way to make it up to a disappointed Rebekah (CLAIRE HOLT).

Shane (DAVID ALPAY) leads an expedition to a desolate island, where he believes the secret of the cure lies hidden. Rebekah (CLAIRE HOLT) and Elena continue their bitter rivalry.

Damon has an ugly run-in with a Hunter, Vaughn (CHARLIE BEWLEY - The Twilight Saga), and realizes he is one of the Five. Stefan admits his feelings about possibly becoming human.

Damon and Rebekah (CLAIRE HOLT) learn an unexpected bit of recent history from Vaughn (CHARLIE BEWLEY). Bonnie reveals the rest of Shane's (DAVID ALPAY) plan.

Elena's new outlook has everyone concerned. Damon and Rebekah (CLAIRE HOLT) work together, but his unwanted advice catches her off-guard. Klaus tries to use Hayley (PHOEBE TONKIN).

Realizing that Elena needs some time away from Mystic Falls, Damon takes her to New York City. Flashbacks reveal Damon's hedonistic life there in the 1970s.

While in a small town in Pennsylvania with Rebekah (CLAIRE HOLT), Elena has a surprising encounter with Elijah (DANIEL GILLIES). Klaus receives Caroline's reluctant help.

When Caroline's plans for the perfect Senior Prom night are disrupted by Elena, she turns to an amused Klaus for a solution. Bonnie makes a terrifying discovery.

Klaus returns to his past in New Orleans and meets with his former protégé, Marcel (CHARLES MICHAEL DAVIS), a charismatic vampire with control over the city's inhabitants.

The Salvatore brothers ask for backup from a surprising source when Elena calls their bluff. Katherine is suspicious when Bonnie makes her an offer.

Someone has been attacking patients at the hospital. A violent wind storm causes a power outage and ghosts suddenly appear - some with good intentions and some bent on revenge.

Season finale: It's Graduation Day. Damon's life is in danger and Elena faces an epic confrontation. Plus, Stefan discovers a horrifying clue to the mystery surrounding Silas.

As the fifth season opens, Elena, after a passionate summer with Damon, heads to college nearby with Caroline as her roommate. Plus, a terrifying appearance by Silas (PAUL WESLEY).

A fellow Whitmore student named Jesse (KENDRICK SAMPSON) gives Elena some intriguing information about Professor Wes Maxfield (RICK COSNETT). Damon asks for help finding Stefan.

When Elena and Katherine have the same dream that Stefan is in danger and desperately needs their help, they convince Damon to help them find Stefan. However, their plans are thwarted by a mysterious young woman named Tessa who seems to know everything about Stefan's history. In flashbacks to a distant time and place, Tessa reveals the shocking secrets in her past and what she has planned for the future. She also has a disturbing message for Damon about his own future. Silas forces an unwilling accomplice to help him search for Katherine, leading to a confusing and life-threatening situation for Matt. Finally, Silas reveals the reason he's determined to find Katherine, and Damon and Elena face a disturbing new reality.

Damon and Elena try to help Stefan through a confusing time, which ends up taking Elena on an emotional journey. Caroline makes an effort to know Jesse (KENDRICK SAMPSON) better.

On campus, Elena is touched by a sad and secretive student named Aaron. Elena and Damon attend the Whitmore Historical Ball dressed as Anne Boleyn and Henry VIII. At the ball, Elena shares a dance with Dr. Maxfield, who has a disturbing message for her. Caroline's evening at the ball takes her from happiness to heartbreak. Meanwhile, Nadia reveals her surprising history to Katherine, and Damon tries to make a deal with Silas. But when Silas demands that Damon commit an unthinkable act, it leads to a violent confrontation.

Damon and Elena are skeptical of Silas's new goal; Tessa realizes she was outsmarted by Silas; after discovering a new consequence of becoming human, Katherine decides she needs a new place to stay; Bonnie is impressed with Jeremy.

The power of doppelgangers.... While Elena and Damon try to explain Amara's situation to Stefan, Dr. Wes Maxfield gives Katherine some deeply disturbing news. Nadia shows up at Caroline's dorm room searching for Katherine. After a surprising conversation with Amara, Jeremy and Bonnie share a glimmer of hope. Silas fails to keep a promise, causing Damon to turn to Tessa for help with his new plan, and Stefan makes a heartbreaking confession to Damon and Elena.

At Whitmore College, Elena and Caroline decide it's time to throw a big party, but their plans are interrupted when Jesse suddenly needs Caroline's help. At Elena's request, Damon comes up with an effective method to get Wes to answer his questions. At the party, Elena finds that she and Aaron have a lot in common, and Caroline grows more concerned about Jesse. Meanwhile, Katherine does a favor for Matt and manages to get through to Stefan, who is still struggling to overcome the events of the summer. Finally, Bonnie does her best to cope with her new reality, and Damon makes a terrifying discovery about a secret society.

Damon is trapped by Dr. Wes, and realizes scary things about his past.

Damon realizes Elena is in danger and enlists Stefan's help to find her. The brothers pay a visit to Aaron, and Damon shocks Stefan by revealing his first-hand knowledge of Aaron's family. In an attempt to stop Damon, Dr. Wes unleashes his secret weapon, forcing Damon to deal with a part of his past he thought was gone forever, as well as the consequences of his decades-long plan for revenge. Meanwhile, Elena is horrified by Dr. Wes' confessions about the dark history of Whitmore College and his own ultimate goal. Finally, a frantic Katherine turns to Matt for help, until she realizes that Nadia may be the one who can solve her problem.

Back to Katherine's early life 1490, Nadia helps her mom with a fighting plan.

Damon tries to get back together with Elena, however, Katherine has a plan and attempts to take Elena's body permanently. Tyler is upset with Caroline and Matt is used by Katherine. Enzo finds Damon and they decide to become a team again.

Hoping to help everyone move past recent traumatic events, Caroline convinces Elena and Bonnie to attend Whitmore College's "Bitter Ball" for broken-hearted students. Bonnie is intrigued with a fellow student named Liv, who appears to be dabbling in witchcraft. Tyler starts to worry about Matt's relationship with Nadia. After making a disturbing discovery, Stefan has a frustrating conversation with Damon and Enzo. Dr. Wes struggles to continue his research project with help from a new benefactor named Sloan. Still bent on revenge, Damon and Enzo resort to violence to convince Bonnie and Jeremy to help them, but their plan takes an unexpected and horrifying turn.

As Damon's behavior escalates from destructive to deadly, Stefan begins to regret their last conversation and decides to track Damon down and intervene. For reasons of her own, "Elena" volunteers to come along. Dr. Wes enlists the Travelers to set a trap that will once again test Damon's friendship with Enzo. After a heart-to-heart talk with Nadia, Matt enlists Caroline and Tyler's help to protect Elena, leading to a violent confrontation. Later, when Stefan tries to comfort a dejected Caroline, their conversation leads to a horrifying realization.

While Nadia remembers her centuries-long search for her mother, Stefan, Caroline and Matt come up with a desperate new plan to save Elena's life. For the second time, Bonnie and Jeremy must turn to Liv for help. Damon baits Tyler into a nasty confrontation, then takes off to seek revenge on Dr. Wes. Caroline and Tyler come to a new understanding. Finally, Bonnie learns of a terrifying secret that will threaten the lives of all her friends.

Damon tries to figure out how to make a disturbing confession to Elena.

Bonnie has an unsettling encounter with Luke (CHRIS BROCHU), and learns more about his family history. The Travelers' leader, Markos (RAFFI BARSOUMIAN), arrives in Mystic Falls.

Elena and Stefan start having dreams about an alternate version of their lives; The Travelers move in on Mystic Falls; Matt has a frightening encounter on the Other Side.

Enzo holds Elena, Stefan and Bonnie hostage to uncover the truth about the love of his life. Markos performs a ritual to undo witch's magic.

Damon and Caroline suspect Stefan and Elena of keeping a secret while they hide from the travelers, unaware of the dead man out for revenge. Meanwhile Matt, Jeremy and Bonnie help Tyler get rid of Julian.

When Stefan and Elena escape from Markos' control, only to find themselves Stranded in a remote location, Stefan gets philosophical with Elena about her relationship with Damon. After their attempt to protect the doppelgangers goes badly, Liv and Luke come up with a dangerous new strategy. Damon recruits Matt and Jeremy to help him set a trap for Markos, who turns out to have a devastating surprise of his own. Bonnie finally admits to Caroline that she's been keeping the truth about the Other Side from everyone. Finally, while Bonnie searches desperately for a way to stop Markos, Caroline is witness to an unthinkable act of violence by one of the Travelers.

Damon's plan causes a huge explosion in Mystic Falls, and everyone is caught up in the confusion, leaving a trail of heroism, sacrifice, relief and despair.

Four months have gone by since the Other Side broke down and Bonnie and Damon were lost. Mystic Falls is still a supernatural-free area. Everyone is grieving in their own ways, and some worse than others.

Knowing she needs to come to terms with the loss of Damon, Elena turns to Alaric to help her move on with her life. Enzo convinces Caroline to join him as he tracks down a lead to get Damon and Bonnie back, but Caroline is shocked when they make an unexpected detour and uncover what Stefan has been up to. Meanwhile, Matt worries about Jeremy who is spending time with Sarah, a mysterious girl who has recently arrived in Mystic Falls. Elsewhere, Tripp, leader of the community protection program, makes an interesting confession to Matt about his connection to the town. Lastly, with the Other Side destroyed and gone for good, Damon and Bonnie reluctantly band together to uncover the mystery of where they are and how they are going to get back home.

Caroline admits that she has feelings for Stefan. Bonnie and Damon find clues that make them think they might not be alone.

Damon and Bonnie are trying to come up with a way to come back from the otherside, while Stefan tries to help Elena start fresh.

Elena invites Liam to a party at the corn maze; Stefan shows up asking Caroline for help with a mess created by Enzo; Tyler winds up in a dangerous position.

Elena can't decide whether she wants her memories of Damon back; Alaric asks Elena to look into Jo's background; Tripp puts Damon, Enzo, and Alaric in mortal danger.

Elena is forced to confront her problems; Liv and Tyler get closer; Damon finds a surprising clue that renews his hope.

Elena gets some hopeful news from Alaric and Stefan regarding the Gemini Coven; Tyler tries to help Liv and Luke after learning of disturbing plans the coven has for them; dinner takes a drastic turn for Jo; Kai makes a dangerous discovery.

Elena and Damon enter the prison world to bring Bonnie home. Complications arise when Kai escapes and finds Liv. Stefan finds out the truth about Sarah.

Bonnie tries to replicate her favorite traditions, while reminiscing about happier times with her friends; Sheriff Forbes brings holiday cheer to Caroline at Whitmore College; Alaric turns to Damon and Elena for help when Jo goes missing; Tyler approaches Liv and Luke with a risky plan; Jeremy helps Matt carry out a plan to take down Enzo; Stefan is forced to break some devastating news to Caroline.

As Kai learns how to control his magic, he holds Elena captive; Caroline and Stefan go to North Carolina in search of a cure for Sheriff Forbes; Damon realizes Elena has been kidnapped.

Caroline struggles to save her mother. Damon comes up with a daring new plan. Jo and Kai prepare to merge, but Luke intervenes.

Elena is determined to celebrate Bonnie's birthday; after learning Stefan's secret, Enzo wants to interfere in Sarah Salvatore's life; Caroline struggles to cope with everything going on around her.

Elena and Jeremy reminisce about their past; Caroline and Stefan grow closer; Sheriff Forbes asks Damon for help with a case involving Elena's parents; Enzo lures Matt and Sarah into his plan.

Everybody gathers for the funeral of Liz Forbes. Elena is worried Caroline isn't coping as well as everyone believes.

Stefan blames himself for Caroline turning off her humanity. Bonnie is angry with Damon for aligning himself with Kai. Sarah's life is in danger.

Elena and Damon enter the 1903 prison world to bring back his mother. Stefan intends to exact revenge on Caroline. Bonnie cannot forgive Kai.

Damon concocts a risky plan involving Lily to stop Caroline and Stefan from wreaking havoc; Elena re-evaluates her life as a vampire after learning that Jo is pregnant; Sarah turns the tables on Enzo; Tyler and Matt wind up in danger.

Stefan concocts a plan to get Caroline to turn her humanity back on. Damon wrestles with what he should do with the cure. Enzo seeks answers.

Damon and Elena discuss the ramifications of Damon's offer. Alaric and Jo reluctantly participate in their bachelor and bachelorette parties. Lily continues on a dangerous downward spiral.

Elena and Bonnie help Jo with last minute wedding preparations.

In the aftermath of Jo and Alaric's wedding, an unexpected, and definitely uninvited guest shows up, putting Elena's life in jeopardy. Despite Matt's attempt to leave town to save himself, Bonnie takes matters into her own hands after finding herself on the receiving end of a twisted plan.

Damon is faced with a new reality without the love of his life; Bonnie decides to be Damon's moral compass, and look out for Alaric, who lost his fiancée. Stefan protects the town from Lily; Enzo must decide who he is loyal to.

Damon makes a decision that could ruin Lily and Stefan's deal; Alaric needs Bonnie's help with an artifact; Caroline discovers a shocking secret.

In the aftermath of a clever plan orchestrated by Lily, Damon sets off on a road trip with Bonnie and Alaric in search of leverage they can use against his mother. Meanwhile, Caroline, who is being held hostage by the Heretics, learns some shocking information about Valerie's past, while Stefan learns a few unexpected details about his own past from Lily. Finally, Alaric turns to Bonnie for her help after coming clean about a secret he's been keeping.

Just as Damon thinks he's gained the upper hand in his fight against Lily, an unexpected turn of events leaves him scrambling for a plan B.

Bonnie, Damon, and Alaric go through a tough shock with the Phoenix stone, while Caroline sent Stefan to spend the day with his ex, Valerie.

After being reunited with her former love Julian, Lily hosts a dinner party to introduce him to Damon and Stefan and to declare peace between her family of Heretics and the residents of Mystic Falls. Damon and Stefan find themselves at an impasse when they realize they have differing views on how to handle Julian's arrival. At the party, Bonnie and Matt uncover a strange mystery involving some unsuspecting residents, while a devastating revelation causes Alaric to reach his breaking point.

Damon and Stefan conspire to kill Julian, while Caroline struggles with the fact that she's pregnant with Ric's kids.

It's Nora and Mary Louise's anniversary and Julian has big plans for the night, however, Lily and her sons have even bigger plans for Julian.

In the events following their mother's passing, Stefan and Damon try to engage in the holiday spirit.

Damon's soul is stuck in the phoenix stone, the world of the phoenix stone is trying to break Damon emotionally and at the same time Damon's family and friends are trying to bring him back.

Caroline throws a baby shower for Alaric's twins, and the Salvatore brothers face the hallucinations caused by the Phoenix Stone.

Stefan uncovers the reason behind Damon's dark descent following his experience in the Phoenix stone.

Vampire hunter Rayna Cruz is on the loose and Damon has to make things right when his actions inadvertently put his loved ones in her path.

Stefan goes to New Orleans to lure Rayna Cruz away from his friends and comes face to face with Klaus Mikaelson, who's suspicious of his old friend's arrival.

Tired of having everyone sacrifice themselves for him, Damon decides to leave the group. Meanwhile, Bonnie's new discovery threatens Damon's plans to stop Rayna.

Stefan will find himself with a choice to make and his decision will determine the fates of everyone he cares about, especially Damon.

In the aftermath of his brother's fateful decision, Stefan awakens to find himself thrown into a life or death situation with only his basic instincts to rely on. With time working against him, he sets off on a journey of survival while forced to confront a lifetime of irreversible damage Damon has done to their relationship. Meanwhile, desperate to save his brother, Damon follows an unusual lead he has come across, while Matt sends Valerie to Dallas to enlist Alaric's help in the search for Stefan. Finally, when Rayna discovers the emergence of a new threat, she sets off on her own mission to find Stefan before the others do.

Determined to capture an escaped vampire named Ambrose, who may be the key to getting Stefan back safely, Damon heads to Memphis with Alaric in tow. However, reluctant to step back into his former vampire-hunting ways, Alaric makes his unwillingness to participate clear, while revealing the truth about the past three years of his life without Damon. Meanwhile, in the psych ward, Bonnie meets a young woman named Virginia, who provides her with some valuable information about why The Armory may be after her. Finally, Enzo takes matters into his own hands when he learns some devastating news from Rayna.

When Enzo's efforts to protect Bonnie end up putting her life in jeopardy, they learn that Rayna may hold the key to her survival. With time running out and Rayna at the reins, Enzo and Bonnie reluctantly team up with Damon, who is desperate to save Bonnie's life and to repair their broken friendship. Elsewhere, when Stefan travels to Dallas and comes face to face with Alaric, tensions escalate and they are forced to confront the fallout from Stefan's absence in Caroline's life. Finally, Enzo learns The Armory's true motives behind their search for Bonnie.

With Bonnie's life at stake and an uphill battle ahead of them, Damon and Enzo lead the charge to save Bonnie before her condition worsens. Stefan reluctantly teams up with Matt for the sake of Bonnie and uncovers the truth behind Matt's anger towards him. Elsewhere, determined to help her best friend, Caroline joins Alaric on a mission and quickly realizes how much she's missed her former supernatural lifestyle. Finally, after their plan takes an unexpected turn, Damon makes a fateful decision that will forever change his relationship with Bonnie.

When Damon's risky attempt to save Bonnie takes an unexpected turn, the consequences of his actions forces everyone to band together to help her pull through. Meanwhile, when a new threat leaves Caroline's life in jeopardy, Stefan makes a rash decision that ultimately forces them to face the fallout from their relationship. Elsewhere, Enzo tries to hold it together as he painfully watches Bonnie in the fight of her life, while Matt takes matters into his own hands to save one of his closest friends. Alaric also appears.

Despite their best efforts to help Bonnie through the harrowing predicament she now faces, Damon, Enzo and Caroline realize their options are running out and drastic measures need to be taken. With their only chance of saving their friend lying inside the Armory, Stefan breaks the news to Caroline that they may need help from an unlikely source - her and Alaric's twin daughters. Elsewhere, Enzo keeps Bonnie preoccupied by bringing her back to their cabin but when his plan takes an unexpected turn, it'll be up to Damon to make the ultimate sacrifice to save his closest friends. Matt also appears.

Stefan searches tirelessly for Damon and Enzo months after their mysterious disappearance.

No one can accept the loss of Damons humanity that Enzo hopes for too, Damon carelessly tries to prove everyone wrong.

As Enzo continues to fight the control over him, Bonnie finds herself at the center of a deadly game and forced to make a heart wrenching decision involving two of the most important people in her life. At the Armory, Alaric researches a mysterious artifact that he hopes will help in their fight to get Damon and Enzo back. Finally, Damon's downward spiral leads him to Tyler Lockwood who attempts to talk some sense into him before it's too late.

Meanwhile Alaric and Stefan try to find out about the origins of what they are up to, Damon is searching for an artifact so he travels to Texas where he encounters Peter Maxwell who leads him to a new revelation.

Stefan and the others remember what matters most when tragedy strikes close to home.

When her children become the focus of the Siren's latest plan, Caroline (Candice King) takes drastic measures to ensure nothing gets in the way of keeping her family safe. In a race against the clock, Stefan (Paul Wesley) pledges to do everything he can to save the twins, while tensions between Alaric (Matt Davis) and Caroline boil over, leading them to face some harsh realities about the future of their family. Meanwhile, when Enzo (Michael Malarkey) finds himself unable to fight off Sybil's (guest star Nathalie Kelley) latest move, Stefan dives into his subconscious and along the way, sets off a chain of events that leaves him faced with a life-changing decision.

Faced with the fallout from his interaction with Cade (Wolè Parks), Stefan (Paul Wesley) is determined to have one thing go right - Christmas Eve with Caroline. However, when Damon (Ian Somerhalder) and Sybil (Nathalie Kelley) crash their Christmas Eve dinner, which had been joined by Alaric (Matt Davis), Matt (Zach Roerig) and Peter (Joel Gretsch), things quickly take a dark and twisted turn. Meanwhile, in a series of flashbacks to Stefan's past, Cade's attempt to entice him with his mysterious agenda leaves Stefan faced with an unimaginable decision. Kat Graham and Michael Malarkey also star.

Stefan and Damon attend an anger management support group looking for their next victim. Sybil is still alive and teaching a group of high school students who she'll later use as leverage to get Caroline to locate a historical artifact that can be used against her. Meanwhile, Stefan and Damon continue their commitment to Cade as they test the morals of a young doctor, Tara.

Mystic falls is greeted by a traditional celebration and also two reckless brothers. Caroline remains in denial about the future.

Sybil puts Damon in a catatonic state for revenge. Caroline and Bonnie enter Damon's mind and realize Stefan is the key to his fate. Sybil competes with her sister for control of the bell.

Cade returns to Mystic Falls with new assignments for Damon and Stefan that each lead to unthinkable consequences.

Damon makes a deal with Cade to retrieve the Maxwell journal in exchange for Stefan's soul.

Damon and Alaric face an old enemy after finding a weapon that might kill Cade. Stefan is captured by someone from his past. Bonnie tries to reach out to Enzo through Cade.

Damon and Stefan join forces against Cade to protect Elena's casket, while Caroline and Alaric cope with their daughters' growing powers.

A wedding is quickly planned in order for Damon and Stefan to lure a dangerous enemy out into the open.

With the fate of Mystic Falls at stake, Stefan and Damon must fight their greatest enemy for one last battle.

In the aftermath of his brother's fateful decision, Stefan awakens to find himself thrown into a life or death situation with only his basic instincts to rely on. With time working against him, he sets off on a journey of survival while forced to confront a lifetime of irreversible damage Damon has done to their relationship. Meanwhile, desperate to save his brother, Damon follows an unusual lead he has come across, while Matt sends Valerie to Dallas to enlist Alaric's help in the search for Stefan. Finally, when Rayna discovers the emergence of a new threat, she sets off on her own mission to find Stefan before the others do.

When Stefan and Elena escape from Markos' control, only to find themselves Stranded in a remote location, Stefan gets philosophical with Elena about her relationship with Damon. After their attempt to protect the doppelgangers goes badly, Liv and Luke come up with a dangerous new strategy. Damon recruits Matt and Jeremy to help him set a trap for Markos, who turns out to have a devastating surprise of his own. Bonnie finally admits to Caroline that she's been keeping the truth about the Other Side from everyone. Finally, while Bonnie searches desperately for a way to stop Markos, Caroline is witness to an unthinkable act of violence by one of the Travelers.

With the fate of Mystic Falls at stake, Stefan and Damon must fight their greatest enemy for one last battle.

Stefen gets a surprise visit from old friend Lexi. Caroline tries to get Damon's Medallion back from Bonnie.

Faced with the fallout from his interaction with Cade (Wolè Parks), Stefan (Paul Wesley) is determined to have one thing go right - Christmas Eve with Caroline. However, when Damon (Ian Somerhalder) and Sybil (Nathalie Kelley) crash their Christmas Eve dinner, which had been joined by Alaric (Matt Davis), Matt (Zach Roerig) and Peter (Joel Gretsch), things quickly take a dark and twisted turn. Meanwhile, in a series of flashbacks to Stefan's past, Cade's attempt to entice him with his mysterious agenda leaves Stefan faced with an unimaginable decision. Kat Graham and Michael Malarkey also star.

Elena invites Stefan and Bonnie to dinner, hoping that the two will bond, but the evening is disrupted by the unexpected and unwelcome arrival of Damon and Caroline.

Stefan escorts Elena to the town's Founder's Party. At the party, Damon tells Elena a story about the Salvatore family, leaving Elena with questions Stefan refuses to answer.

Vampire hunter Rayna Cruz is on the loose and Damon has to make things right when his actions inadvertently put his loved ones in her path.

When Sheriff Forbes tells Damon of another attack, he offers to track down the killer, learning startling information about the town's founding families.

Stefan is hopeful of his plan to get rid of Damon, and decides to reveal parts of his past to Elena. Bonnie seeks advice from her grandmother (Jasmine Guy - A Different World).