Disturbing Behavior

"Disturbing Behavior" is the fourth episode of the third season of The CW television series, The Vampire Diaries and the 48th episode of the series overall. It originally aired on October 6, 2011. The episode was written by Brian Young and directed by Wendey Stanzler. Plot Stefan (Paul Wesley) and Klaus (Joseph Morgan) take Rebekah (Claire Holt) for shopping and when Stefan gets out of the store, he sees Katherine (Nina Dobrev). When he asks her what she is doing there, Katherine tells him that she knows the necklace Klaus is looking for, it is the one that he gave to Elena. Stefan says that he will make sure Klaus will not find out about it. Liz (Marguerite MacIntyre) tells Damon (Ian Somerhalder) about Bill (Jack Coleman) and what he did to Caroline (Candice Accola) and that she wants him to erase his memory. They get to the basement, and when Damon makes sure that Bill does not have any more vervain in his system, he compels him to forget everything about Caroline being a vampire. Elena, Caroline and Bonnie (Kat Graham) are cooking for the Founder’s Party when Elena feels her necklace burning her. That is because Gloria (Charmin Lee) casts a spell trying to find out where the necklace is. When Bonnie tries to catch it, she feels the magic and she tries later to find out what is going on with it. She discovers that the necklace has its own magic while Gloria hides from Klaus what she felt when she was doing the spell and asks for more time.