S2, E16: Katherine's mind games are getting on everyone's nerves, but Damon, Stefan and Elena realize that her knowledge of Mystic Falls' history will help them stay alive. Frustrated with her relationship with Matt, Caroline finds a new way to get his attention. Alaric makes a surprising confession to Jenna, and Katherine makes a different kind of confession to Damon. Meanwhile, Stefan and Bonnie try to convince Jonas (recurring guest star Randy Goodwin) and Luka (recurring guest star Bryton James) that they should all be working together, but Jonas' lack of trust leads to a violent and fiery confrontation.