Brave New World

S2, E2: After Katherine's attack on her, a confused and desperate Caroline checks herself out of the hospital and joins her friends at the Mystic Falls Carnival, but her new nature causes serious problems. Damon has a drastic solution, but Stefan and Elena come to Caroline's defence while a shocked Bonnie turns her anger on the elder Salvatore. Meanwhile, Damon's suspicions about Mason Lockwood grow.