Title: Know Thy Enemy
Air Date: April 7, 2011 at 8:00 PM PDT
John lands on both Elena’s and Alaric’s lists when Isobel’s visit upsets Jenna. Bonnie, Damon, and Jeremy look for a spell that will allow her to tap into her ancestors’ power. Now that Matt knows about Caroline, she’s unsure how to make amends with him. A new secret weapon finds its way to Stefan and Damon.