- Paul Wesley (Stefan Salvatore)
- Ian Somerhalder (Damon Salvatore)
- Kat Graham (Bonnie Bennett)
- Candice King (Caroline Forbes)
- Zach Roerig (Matt Donovan)
- Michael Malarkey (Enzo St. John)
- Matthew Davis (Alaric Saltzman)
The Vampire Diaries — S2E17
Episode: Know Thy Enemy
Air Date: 2011-04-07
Runtime: 43 min
Overview
Elena and Alaric both lash out at John when Isobel’s unexpected arrival leaves Jenna devastated. Bonnie works with Damon and Jeremy to find the spell they’ll need to harness her ancestors’ power. A heartbroken Caroline doesn’t know what to do about Matt. Stefan and Damon realize they have a new secret weapon.