<Tr> <Td_colspan="8"> Liz accepts Caroline, and Caroline compels her mother to forget that she is a vampire . Bonnie incapacitates Mason by giving him an aneurysm . Damon then questions and tortures Mason who, believing that Katherine loves him, refuses to talk . Telling Mason that Katherine is using him, Damon eventually kills him . Bonnie has a vision of the moonstone's location in a well . Stefan discovers that the well is full of vervain, which burns him . Caroline and Bonnie help Elena rescue Stefan and retrieve the moonstone . Katherine compels Jenna to stab herself . Fearful of what else Katherine might do, Elena breaks up with Stefan for good . Needing another werewolf, Katherine compels Matt to attack Tyler, so that Tyler will kill Matt and become a werewolf . </Td> </Tr> <Tr> <Th> 29 </Th> <Td> 7 </Td> <Td> "Masquerade" </Td> <Td> Charles Beeson </Td> <Td> Kevin Williamson & Julie Plec </Td> <Td> October 28, 2010 (2010 - 10 - 28) </Td> <Td> 2J5257 </Td> <Td> 3.55 </Td> </Tr> <Tr> <Td_colspan="8"> Stefan, Damon, Bonnie, Jeremy, Alaric, and Caroline plan to kill Katherine at the Lockwoods' masquerade ball . Katherine is visited by Lucy, a witch who is to help her retrieve the moonstone . Under Katherine's compulsion, Matt fights Tyler . Caroline breaks up the fight, but Sarah, who is also compelled, stabs Tyler, and he accidentally breaks her neck . Tyler's eyes turn yellow, showing that the curse has been triggered . Stefan and Damon try to kill Katherine, but they stop when Jeremy tells them that every time they stake her, Elena is wounded . Katherine reveals that she had Lucy put a spell on Elena and herself, which linked them . Lucy, who is Bonnie's cousin, lifts the spell and incapacitates Katherine, who collapses . Damon traps Katherine in the underground tomb . As Elena heads home she is intercepted by a masked stranger . </Td> </Tr> <Tr> <Th> 30 </Th> <Td> 8 </Td> <Td> "Rose" </Td> <Td> Liz Friedlander </Td> <Td> Brian Young </Td> <Td> November 4, 2010 (2010 - 11 - 04) </Td> <Td> 2J5258 </Td> <Td> 3.63 </Td> </Tr>

What episode of vampire diaries does elijah come in