THE VAMPIRE DIARIES Season 3 Episode 7 : Ghost World
Bonnie learns about the ghosts and tries to send them away but instead gives them physical form. Elena catches Jeremy kissing Anna, Bonnie is reunited with Grams, Damon can see Mason, Stefan sees Lexi, and the tomb vampires come back. Mason tells Damon that he knows where to find a weapon that can kill Klaus, so they search for it. Lexi attempts to help Stefan find his humanity, and the tomb vampires attack the founding families. At the end, Bonnie sends all the ghosts away. But before that, Mason shows Damon a secret cave containing the story of the Originals.