The Vampire Diaries

Season 2 Episode 17

Know Thy Enemy

Aired Friday 8:00 PM Apr 07, 2011 on The CW



  • Trivia

    • Goof: When Maddox attacks Katherine after she ends her phone call with Isobel, Katherine has Elena's necklace around her neck. However, when the camera angle changes after Katherine falls to the floor, the necklace is missing.

  • Quotes

    • Isobel: (looking at her own grave with Elena) My parents--your grandparents--they put it here when it became clear that the police weren't going to find my body. They visit every week and they bring flowers even though there's no one buried here. The Isobel they knew is dead. So, maybe there's a part of me that's buried here, the human part. The part that I abandoned when I chose to become a vampire. The part that used to dream about the day she'd know her daughter.
      Elena: What?
      Isobel: Instead you got to meet the other part. The part that would betray her own flesh and blood.

  • Notes

    • Beginning with this episode, Katerina Graham (Bonnie) is credited at Kat Graham.

    • Although credited, Michael Trevino (Tyler) does not appear in this episode.

    • Featured Music:
      "Halfway Gone" (Lifehouse Cover) by Piano Tribute Players
      "Give Me Strength" by Snow Patrol

    • Original International Air Dates:
      Canada: Thursday, April 7, 2011 on A
      United Kingdom: Tuesday, April 12, 2011 on ITV2/ITV2 HD
      Philippines: Tuesday, April 12, 2011 on ETC
      Australia: Thursday, April 21, 2011 on GO!
      Norway: Thursday, May 5, 2011 on FEM
      Sweden: Friday, May 6, 2011 on TV6
      Slovakia: Sunday, March 25, 2012 on Markiza
      Czech Republic: Thursday, July 26, 2012 on TV Nova
      Turkey: Sunday, July 29, 2012 on CNBC-e

  • Allusions