Now that Manwitch, Dr. Martin and his boy Luka have been killed off, that only leaves Bonnie to deal with the impending threat of Klaus. Will Bonnie be able to fight him alone? Zap2it has some spoilery news about Bonnie's chances, plus it looks like Klaus and Greta will be hitting Mystic Falls just after the Decade Dance in the April 21st episode.
With her powers returned to her, that leaves Bonnie (Katerina Graham) as the last witch in Mystic Falls... but not for long. We'll meet Greta Martin, Luka's sister, when Klaus (Joseph Morgan) comes to town in this season's 19th episode, airing April 21. He's been holding her captive as he tries to find a new way to break the sun and moon curse -- at least, that's what Luka and Dr. Martin believe.
According to "The Vampire Diaries" casting call, Greta is described as in her 20s, "African-American, cool, hip, smart. A bit of a thrill-seeker."