<P> In season three, Elena does everything in her power to make Stefan get his humanity back, which was turned off by Klaus as payment for saving Damon from a werewolf bite in the latter part of season two . Meanwhile, she grows closer to Damon while working together on saving Stefan and trying to defeat Klaus, eventually even sharing a kiss . She later admits to Stefan that she has feelings for Damon as well but that she never stopped loving Stefan . While in Denver together, Elena kisses Damon, later telling him that she doesn't know how she feels about him . It is eventually revealed that Elena met Damon the night of her parent's death, though he compelled her to forget . She eventually chooses Stefan in the season finale but before she can tell him, Elena drowns while having vampire blood in her system . During the last moments of season three, she awakens as a vampire in transition . </P> <P> In season four, Elena is faced with the tough decision of whether to die or to feed on human blood so she can fully transition into a vampire . Elena, after realizing Stefan's desperation to keep her alive, decides to complete her transition . Her relationship with Stefan ends, allowing her to begin a proper romance with Damon . Although, it is later revealed there is a sire bond between them . Sometime later whilst searching for the cure for vampirism, Jeremy is fed to the immortal Silas by Katherine . As a result, Damon used the sire bond to convince her to turn off her humanity, due to her incredible grief over losing her brother and the last remaining member of her family . Elena became ruthless without her emotions, going on killing sprees and being very hateful towards her friends . Towards the end of season four, Damon kills Matt in front of Elena to trigger her grief . After revealing that Matt had the Gilbert Ring on, Elena's humanity was switched on and her emotions were focused on hate towards Katherine for killing Jeremy . Season four ended with Bonnie as a ghost after bringing Jeremy back to life and Elena fed Katherine the cure for vampirism in a moment of desperation as she was about to be killed . Elena had chosen Damon as the Salvatore that she loved . </P> <P> In season five, Elena starts at Whitmore College and is happy after spending the summer with Damon . There she realises that Silas has taken Stefan's place and that Stefan is in that safe in a river constantly drowning . She and Damon then find the safe, only to find a dead body there meaning that someone opened the safe and Stefan is a Ripper again . However, Qyetsiyah had fried Stefan's brain causing him to suffer amnesia . While trying to bring him back, they almost kiss meaning that she still feels something for him . Qyetsiyah soon brings back Stefan's memories and says that Elena and Stefan were always meant to be as the Universe had to unite the doppelgängers of Silas and Amara . This leaves Damon and Elena questioning their relationship . Later on she is kidnapped and experimented on by Wes Maxfield, and she learns that her father also used to experiment on vampires . Later, when Katherine is about to die as a result of all of her years catching up with her as a result of having the cure in her system, Katherine uses a spell and possesses Elena, a fact that her friends were initially unable to deduce . But once they did, they trapped Katherine and left her with no escape . Stefan stabbed her with the traveller dagger, but ghost Katherine reveals to Bonnie, shortly before trying to cross into the Other Side, that she had injected Dr. Maxfield's enhanced ripper / werewolf virus into Elena's body, infecting Elena . The gang is eventually able to find an antidote . She unfortunately loses trust in Damon, partly because he killed her friend Aaron, so they break up, but realise they cannot survive being apart and get back together . Once Markos and his traveller army begin to take over Mystic Falls, setting an anti-magic barrier around the town, the gang comes up with a plan to take out the travellers by killing them all at the same time, overpowering the anchor to the Other Side AKA Bonnie and creating a possible way out of the now - collapsing Other Side . Elena and Damon drive into the gas - filled Mystic Grill with most of the travellers in it, blowing it up and killing most of the people in it, including Elena and Damon . She wakes up as a ghost and finds her body, sending her to Bonnie, where she passes to the Other Side, and she and many others are able to pass back to the land of the living afterwards . But the spell that allows this is broken before Damon passes back through, and as Bonnie is the anchor, she is a part of the Other Side and shall therefore disappear along with it . This leaves the gang mourning the loss of Damon and Bonnie in the season finale . </P> <P> In season six, Elena starts back at Whitmore, and is unable to set foot in her hometown . She is also unable to recover from Damon's death and starts lurking the borders of Mystic Falls in order to grab civilians, drink their blood, then compel them to forget, but as spirit magic no longer works in Mystic Falls, any of her victims who cross into the town remember the ordeal, putting her identity as a vampire at risk when one of her victims, Sarah, comes to town . Elena begs Alaric to compel her to forget that she ever loved Damon, which Alaric is able to do, due to him being an Enhanced Original, with the ability to compel other vampires . She eventually wears him down and asks her friends to never remind her once the compulsion had been done . After a number of failed attempts, Alaric successfully compels her to forget her love for Damon . She however leaves Alaric with some of her reminders of Damon, should she ever need them again . She is told of her former feelings for Damon soon afterwards, but decides to stay the way she is, as she doesn't want to go back to being unhappy again . She starts to date her classmate, Liam . Once Damon comes back to life, Alaric tries to convince Elena to allow him to undo the compulsion, a decision she is reluctant to make . She eventually decides to have him undo it, but Alaric goes back to being human again after crossing into Mystic Falls, causing him to lose his vampire status (he only stayed alive because his once fatal human injuries were healed), meaning he will not be able to do so . She is then left to finally come face - to - face with Damon and see if she'll still feel the same way about him . They eventually rekindle their relationship, Elena takes the cure that Bonnie gave Damon . At Alaric's wedding Kai ruins their wedding and casts a sleeping spell on Elena, linking her life to Bonnie's . She makes a sacrifice to let Bonnie live out her life until it is her turn . She bids goodbye to her friends and loved ones before parting ways but knows that she will see Damon, Stefan and Caroline again one day . </P>

What episode does elena turns into a vampire