<P> Meanwhile, Jeremy gets to the party and looks around for Anna . Anna shows up and the two of them go for a walk away from the crowd . Anna tells him that she is leaving town with her mom and Jeremy kisses her . Anna's face begins to show that she is a vampire and Jeremy asks her what is going on when Ben appears and knocks him out . Anna tells Ben to drag Jeremy close to the tomb so they can use him for Pearl to feed on when they get her out . </P> <P> Stefan runs into Ben while he is getting his tools . Anna also appears and tells him that she will take her mother out and gives Stefan a choice . He can try to stop her or save Jeremy from Ben . Stefan leaves Anna and goes and stays alone with Ben who tries to attack him believing he is stronger . Stefan uses the arsonist tool and burns him . </P> <P> Meanwhile, Bonnie and Sheila keep chanting the spell and the tomb's door cracks open . Damon, to be sure that Sheila won't seal him into the tomb, grabs Elena and takes her with him . Inside the tomb, Elena hears whispering and asks what is happening . Damon informs her that they can sense her but he runs off to find Katherine leaving Elena alone . Elena searches for him while she stumbles over the desiccated bodies of the vampires and freaks out . </P> <P> Anna arrives at the tomb finding the door open . Bonnie wants to stop her but Sheila does not let her, so Anna goes into the tomb . Bonnie wants to know why her Grams let her in and Sheila says that no vampire will come out of the tomb . They managed to open the door but not break the seal spell so a vampire can go in but not come out . Stefan comes back and wants to run into the tomb when he hears Damon took Elena with him but Sheila stops him, explaining to him why . </P>

When do they open the tomb in vampire diaries
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