Damon, angry that katherine chose to turn stefan as well, vows to make his brother's life sorrowful thus further causing a century-long rift between the two brothers.
Alaric discovers that his wife isobel was elena's biological mother, and was turned into a vampire by damon at her own request.
Enjoying the summer together, damon and elenas relationship goes off the rails when his dark past comes to the forefront.
In the next episode damon begins trying to track katherine in order to find the cure while rebekah attempts to tag along.
In the following episode damon goes with elena to her family's lake house to help with jeremy's hunter instincts.
He also tells him that the spell is permanent and any attempt to find a loophole in the spell will result in the death of both bonnie and elena.
The only way is by the cure so elena and damon calls katherine who has the cure in her blood and after she arrives her blood is drained by silas,but still katherine lived.
Kai is irritated that his plan to torture damon with an impossible choice had failed and, while he's distracted, damon decapitates him from behind.
Damon and stefan accompany elena to a school dance with a 1950s theme, where alaric introduces himself to damon.
When damon and elena start dating
Damon finally realizes that there is some good in him, and that he may actually want to become a better person.
The course of the series, fans are led to believe that stefan is the first salvatore whom elena meets.
And it's hard for damon to accept that he has to change to have her in his life, which he explains to andy star, his compelled girlfriend a few more episodes in.
During the fiasco, caroline is in a car accident, elena also confronts john with the knowledge that he's her father and bonnie rescues the salvatore brothers, letting them off with a warning so damon doesn't kill anyone innocent.
Silas had seen qetsiyah going to the party therefore both damon and silas goes to the ball party at whitmore college.
The group goes to the mysterious island to find the cure, damon continues to be suspicious of professor shane.
She is reluctant to leave without them, but damon threatens to leave her behind if she doesn't go.
Silas gives damon a crash course on why he looks like stefan and tells where was he the whole summer,shocked to know about this he starts to search stefan with the help of stefan.
She is later turned into a vampire by damon, but her bloodlust was out of control and she is killed by stefan.
When did damon and elena start dating
Elena finds out and attempts to play him all the while damon tells her and rebekah about his time here in the 1970s.
Damon wants to help silas so that silas can do a spell to swap his life with bonnie as silas wants to die.
During that time, they start to bond and form a close alliance to take down kai.
With his vampire diaries co-stars paul wesley (stefan) and nina dobrev (elena) at the 2012 san diego comic-con international.
Damon urges stefan to go get the cure for elena, uncaring that there is only enough for one, because he wants it for the girl he loves.
It is revealed that john is elena's biological father, and that he and isobel had dated in high school.
Damon shows that he has nurtured a long-standing desire to reunite with katherine throughout the first season.
Meanwhile, damon is asked by sheriff forbes to take part in a fund-raising bachelor auction and asks the sheriff for information on alaric.
She shows the video to damon and he recognizes his own mother, lillian salvatore, standing in the background.
In one episode, damon joins rose to find out why the originals are after elena; after some time and clever banter, the two have sex, stating that they could rid themselves of emotion.
What they're doing is setting up a side of damon and elena's relationship that viewers have never seen before: the adorable dating phase.
Damon tells elena about the history of the salvatores after stefan tries to cut damon out of his life.
At the end of the episode damon catches up with jeremy elena follows and urges damon to fight it because "you love me and i love you", but he tells her that he can't, falls to his knees and urges jeremy to kill him.
He confronts damon, and the confrontation ends when damon stabs alaric to death with a stake.
Starts season 4 at elena's bedside after finding out about her dying with vampire blood in her system, causing her to start the transition to vampire.
Damon, who is trying to stop alaric, accepts what she says and she tells him that maybe if she had met damon before she had met stefan, her choice may have been different.
In general, damon is fiercely protective of elena and always puts her safety ahead of all else.
It is revealed that john and isobel, alaric's vampire wife, are elena's biological parents, they had elena adopted by john's brother for her protection.
When elena releases him, stefan goes blood crazy and wants to die but elena manages to talk him out of it.
Elena confronts john with the knowledge that he is her father, stefan having informed her so.
Takes the cure and, unexpectedly, her memories return and she remembers when she'd traveled to nova scotia with damon in search of the cure the first time, he'd told her that he used to miss being human, but, now, he couldn't imagine anything more miserable.
At the end of the episode, he reveals the truth about the cure to elena and explains how stefan has been lying to her only to find this possible cure for vampirism.
Stefan swears elena to secrecy so she won't tell matt and jeremy what really happened to vicki.
Semi-psychic bonnie tells elena that she has a bad feeling about stefan, so elena decides to invite stefan and bonnie to have dinner at her house so that they can get to know each other better.
Damon and elena now existing in separate worlds, the blue-eyed vamp bids his one true love farewell for now.
Aware of stefan's absence and bonnie's death, damon and elena are having the time of their lives before elena leaves for whitmore college.
The season progresses, elena falls for damon all over again as they search for a way to free bonnie and she becomes a large part of his support as his good friend liz forbes becomes more and more ill with cancer.
Damon confronts bonnie, who had taken the ascendant, and tells her that lily is threatening to destroy the cure if he doesn't return with the means to get her "family" back.
Elena's friends and acquaintances also become involved such as tyler lockwood, son of the mayor, and matt donovan, elena's ex-boyfriend and caroline forbes, daughter of the sheriff.
Stefan has been trying to find her and asks damon for help, but he refuses.
The last episode of the 6th season titled "i'm thinking of you all the while" damon rushes elena to the hospital after vampire blood fails to heal and awaken her.
Elena and damon then begin to mend fences, and elena gives him an affectionate hug to help comfort him after rose's death.
Stefan exhibits some unusual behavior at the founder's day event, and things turn ugly when damon tries to find out why john gilbert has returned.
But in "my brother's keeper" elena tells damon that he is the reason she and stefan broke up and at the end of the episode damon and elena have sex.
On his way to the ruins of old fell's church, damon greets emily and reminds her about the deal they made a century and a half ago; damon will protect emily's line and emily will protect katherine.
Later in the episode elena calls damon and confesses she's in love with him and it's the 'most real thing she's ever felt in her entire life', in a moment of weakness damon tells her to come see him.
This incenses damon, causing him to revert to the uncaring and reckless damon seen in the previous seasons.
In "graduation" the sire bond is claimed to be officially broken and elena declared that she is in love with damon.
When stefan attempts to convince damon that he still has some humanity left in him, damon attacks and kills mr.
Damon chases jeremy throughout mystic falls and advises jeremy that he is compelled and he needs to kill him.
Elena saves damon, and he kills bree after she tells him to find emily's spellbook.
Damon saves bonnie's life and they go to the salvatore boarding house to say their goodbyes to elena, deciding that they will allow bonnie to live her life and, when she dies, elena will wake.
Damon returns to the wedding to find bonnie badly injured on the floor and kai's reminder that letting bonnie die will allow elena to regain consciousness.
It's shown that damon and bonnie genuinely care about each other and have made sacrifices for each other.
After dispatching the deputies, damon decides to take out some aggression on matt and is about to snap his neck when stopped by the new vampire elena.