S6, E13: Determined to celebrate Bonnie’s birthday, Elena convinces Jeremy that it’s what Bonnie would have wanted. After piecing the broken ascendant back together, Elena, Jeremy and Damon attempt to send Bonnie a message, but the situation turns dire when they make an unsettling discovery. Meanwhile, after uncovering Stefan’s secret about his great-niece Sarah Salvatore (recurring guest star Tristin Mays), Enzo enlists a reluctant Matt to help interfere with her life. Elsewhere, Stefan keeps a close eye on Caroline as she unconventionally attempts to cope with everything going on around her. Lastly, realizing it might be time to move on with his life, Jeremy contemplates leaving Mystic Falls for good.