S1·E12 Unpleasantville

Damon, Elena and Stefan attend the school dance with a 1950s' theme, where Alaric introduces himself to Damon. Stefan and Damon try to figure out the identity of the new vampire in town, Stefan gives Elena jewelry filled with Vervain to protect her family and friends. To make ends meet Matt takes a job at the Mystic Grill. Ben comes to help Bonnie when he notices Damon is bothering her.