The Vampire Diaries (2009)

S4E21 She's Come Undone

Damon and Stefan adopt a harsh strategy to push Elena into restoring her humanity, but Caroline’s interference only complicates matters. As Elena discovers a way to turn the tables on the Salvatore brothers, they seek unexpected assistance. Meanwhile, Matt offers Rebekah some unsolicited guidance regarding her decisions, and she attempts to reciprocate. Caroline faces a perplexing and perilous situation with Klaus, while Katherine grows wary when Bonnie presents her with a proposal that she claims will be mutually advantageous.