<P> In the beginning of the series, Jeremy was emotionally damaged by the death of his parents and begins to use drugs . He was in love with Vicki Donovan, another drug user, causing a rivalry with her boyfriend, Tyler Lockwood . Vicki later breaks up with Tyler and starts a relationship with Jeremy . However, Jeremy witnesses Stefan kill Vicki (after Damon turned her into a vampire). At Elena's request, Damon makes Jeremy forget this, and Jeremy becomes more stable and stops using drugs . Jeremy then starts a relationship with a vampire named Anna, but John Gilbert, Jeremy's uncle, kills Anna at the end of season one . Jeremy tries to become a vampire by overdosing while having Anna's blood in his system, but he fails . He was later given John's ring, which protects him from a death caused by anything supernatural . In season two, Jeremy falls in love with Bonnie Bennett and they start a relationship . Jeremy later loses both his aunt and uncle on the day of the sacrifice, leaving Elena and himself without a guardian . In the season two finale, Jeremy was accidentally shot to death by Sheriff Forbes, but Bonnie was able to bring him back . </P> <P> However, bringing Jeremy back from the dead allowed him to see and communicate with the ghosts of his former girlfriends, Anna and Vicki, whenever he thinks about them . When the doorway to the Other Side was opened, Jeremy was able to physically interact with Anna . Bonnie finds out, resulting in their break - up . When Bonnie closes the doorway to the Other Side, Jeremy and Anna decide to let each other go . After Jeremy kills a hybrid and was almost killed by Klaus, Elena asks Damon to compel Jeremy into leaving Mystic Falls in order to live a normal life . However, after Klaus and the other Originals find out where Jeremy was, Elena takes Jeremy back home . </P> <P> In season four, a vampire hunter, Connor, arrives in town, and only Jeremy can see his mysterious tattoos, later revealed to be a map to the cure for vampirism . When Connor is killed, Jeremy becomes part of The Five, a group of vampire hunters, and his' hunter's mark' grows when he kills vampires . His urge to kill grows as well, and he attempts to murder Elena . Eventually, he finds a way to control this, and Damon trains him . After killing Kol, resulting in the death of his entire bloodline, Jeremy's mark completes, revealing a map to the cure . However, once he and Bonnie reach Silas, Katherine reveals herself and allows Silas to feed on Jeremy in order to awaken . She steals the cure, and Jeremy is killed when Silas snaps his neck . Elena then burns the Gilbert house, creating a cover story for his death . When Bonnie drops the veil to the Other Side, Jeremy's ghost returns, saving Elena from Kol . Bonnie performs a spell that allows Jeremy to stay alive . The spell, however, killed Bonnie in the process, though Jeremy can see her ghost . </P> <P> In season five, Jeremy attempts to keep Bonnie's death a secret for her in order to preserve her friends' happiness . However, Jeremy eventually reveals the truth to his friends . Bonnie and Jeremy are reunited after she becomes the new anchor to the Other Side, though she sacrifices her life once more in the finale to save Elena, Stefan, Enzo, Tyler and Alaric . It was revealed that Jeremy's supernatural hunter status was inactive as a result of the anti-magic barrier around the town . </P>

When does jeremy turn into a vampire hunter