Title: The Birthday (The Vampire Diaries)
Content:  as Caroline declines Tyler's proposal to be together. Tyler arrives with a date to Elena's birthday party, something that makes Caroline jealous and she ends up kissing him. The two of them go to Tyler's place and after having sex, Caroline tries to sneak out. Tyler's mother, Carol (Susan Walters), who suspects that Caroline must be a vampire, catches her on her way out and when Caroline tries to get her bag she burns out from vervain. Carol shoots her with more vervain injections and Caroline collapses. Damon and Alaric go to the werewolf's house after their last clues about where Stefan and Klaus might be, and find the two girls dead with their heads 
Title: Brave New World (The Vampire Diaries)
Content:  Caroline (Candice Accola) wakes up in the hospital after Katherine (Nina Dobrev) killed her and she is hungry. She asks for food from the nurse but she sends her back to bed. Caroline smells blood from the next room and without knowing what is happening to her, she takes the blood bag to her room and starts drinking. Bonnie (Kat Graham) and Elena prepare the school carnival and talk about Caroline. Elena doesn't want to talk about vampires or Damon (Ian Somerhalder) especially after he killed Jeremy (Steven R. McQueen). Meanwhile, Stefan (Paul Wesley) gives Jeremy a jewel that contains vervain and explains 
Title: List of The Vampire Diaries characters
Content: Played by Candice King ; Starring seasons: 1–8 ; The Originals special recurring guest starring season: 5 ; Legacies Episode: "Salvatore: The Musical!" (voice-over) Caroline Elizabeth Forbes-Salvatore (née Forbes) (based on Caroline Forbes from the novels) is Elena Gilbert and Bonnie Bennett's best friend. She was born in Mystic Falls, Virginia on October 10, 1992. From season seven she becomes one of two female leads. Caroline is the daughter of the Sheriff of Mystic Falls, Liz Forbes, with whom she has a troubled relationship that develops into a more loving relationship. Her father, Bill Forbes, leaves her and her mother after coming out as gay. At the beginning of the series, Caroline is shown as a pathetic and selfish girl. Also as shallow, self-absorbed, jealous, and envious of Elena. She is also known for being insecure and competitive, especially with Elena. However, Caroline's character deepens and matures over the seasons. After she becomes a vampire, she forms confidence in herself that is not seen at the beginning of the series. She stops looking at her life in a shallow and negative light, and her insecurities fade as the series continues.
Title: Brave New World (The Vampire Diaries)
Content:  and Mason, and attacks him. Damon finds Caroline first who is confused and she now feels guilty for killing Carter. Damon promises that he will help her and when he is ready to stake her, Stefan arrives and stops him. Bonnie arrives at the scene and sees that Caroline is a vampire. Stefan takes Caroline away to help her and tell her how she can control her hunger and he promises that he will not let anything happen to her. Outside, Bonnie attacks Damon because she blames him for everything bad that has happened. She uses her powers to put water on 
Title: Rose (The Vampire Diaries)
Content:  he later goes to her house to confront her. He thinks she is also a werewolf and he will not leave until she admits it. Eventually, Caroline reveals herself as a vampire and she tells him that he must not tell anyone. Tyler admits that he is scared the day the full moon will come and he will have to turn into a wolf and Caroline tries to comfort him. Jeremy and Bonnie are at the Gilbert house waiting for news and Bonnie tries a new spell. She tries to send Elena a message but during the spell, her nose bleeds again. As soon as she 
Title: Rose (The Vampire Diaries)
Content:  The man who kidnapped Elena (Nina Dobrev) meets Trevor (Trent Ford), the vampire who asked him to kidnap her, and transports her into his car. Right after Elena is in Trevor's car, Trevor kills the man and leaves with the unconscious Elena. Damon (Ian Somerhalder) talks with Caroline (Candice Accola) about Tyler (Michael Trevino) and how she covered him killing Sarah in the previous episode, something that triggered the curse and will now turn him into a werewolf to the next full moon. Damon warns her to stay away from him and not let him know about her being a vampire or other vampires because a 
Title: Brave New World (The Vampire Diaries)
Content:  anger issues. Back in the hospital, Caroline discovers that her skin burns in the sunlight. Matt (Zach Roerig) shows up to visit her and tells her that she will get released from the hospital next morning. Caroline is terrified to have to go out during the day and tries to convince him that she has to be released that night. Matt notices her strange behavior especially when he tries to open the curtains and Caroline jumps to the other side of the room demanding him to close them. Matt leaves and Caroline continues drinking from the blood bag completing her transformation. She 
Title: The Vampire Diaries
Content:  vampire friends at risk. ; Candice King as Caroline Forbes, Elena and Bonnie's best friend, who was insecure and often jealous of Elena at first, but after becoming a vampire in the second season becomes more caring and sympathetic. Neurotic but lovable, Caroline has been the love interest of many of the male characters. Initially serving as Damon's plaything in season 1, which she still hates him for, she has had serious relationships with Matt, Tyler, Alaric, and Stefan, and was long the subject of Klaus's adoration. Currently, she is raising twins with Alaric. ; Zach Roerig as Matt Donovan, Vicki's younger 
Title: Home (The Vampire Diaries)
Content:  The episode starts with Caroline (Candice Accola) crying over Stefan's (Paul Wesley) dead body at the Whitmore dorm, while Damon (Ian Somerhalder) and Elena (Nina Dobrev) arrive. Stefan watches them from the other side while he starts to be pulled from existence, as the other side continues to crumble. He tries to hold on and Lexi (Arielle Kebbel) appears, saving him. Damon meets Bonnie (Kat Graham) and is furious when he learns that they lost the only traveler who could help them with the spell, and he tells her to find another way because his brother is on the Other Side, along with other 
Title: The Vampire Diaries
Content:  stripped away by magic, turning him into a human again after being saved by Josette Laughlin (Jodi Lyn O'Keefe) and the two begin dating. Jo becomes pregnant and they plan to marry, but she is murdered by her brother Kai at their wedding. Jo's family of witches was able to transfer the babies to Caroline, who gives birth to their twins. Caroline and Alaric move to Dallas together and begin a relationship, but end it when Caroline decides to be with Stefan after his return at the end of season 7. He establishes a boarding school with Caroline for supernatural teens at 

Question: what episode does caroline get turned into a vampire?
Answer: Brave New World.
The Return.