The Vampire Diaries: Season 2, Episode 17

Know Thy Enemy (7 Apr. 2011)

TV Episode  -   -  Drama | Fantasy | Horror
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Ratings: 8.7/10 from 596 users  
Reviews: 2 user | 2 critic

Jeremy is delighted to have Bonnie restored to her powers, yet worried when accompanying her and Damon to the house where a 100 witches were burned to gather enough power to undo the ... See full summary »



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Episode cast overview, first billed only:
Tyler Lockwood (credit only)
Alaric Saltzman (as Matt Davis)


Jeremy is delighted to have Bonnie restored to her powers, yet worried when accompanying her and Damon to the house where a 100 witches were burned to gather enough power to undo the moonstone's curse. Elena's mother Isobel Flemming's return startles her and even Katherine, as turns out doing Klaus's bidding for a gruesome 'prize'. John Gilbert confesses more wrong choices, also at Jenna's expense, yet unlike furious Alaric, Elena ends up choosing to keep her father in her life. The Salvatore brothers piece together from the Gilbert diaries what they believe equals a secret weapon. Matt can't handle the vampire truth and get Caroline to wipe his memory. Written by KGF Vissers

Plot Summary | Plot Synopsis

Plot Keywords:

ritual | fire | fight | kidnapping | fall


TV-14 | See all certifications »




Release Date:

7 April 2011 (USA)  »

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Technical Specs


Sound Mix:


Aspect Ratio:

1.78 : 1
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Did You Know?


When Stefan and Damon arrive at Isobel's house ("the nicest foreclosure in town"), they walk inside into the front hall and pause to decide where to go next. In a long shot we see the front door suddenly swing inwards by itself and stop just short of closing. This happens at least 30 seconds after the brothers have passed through it, the position of the door means it could not have been a gust of wind, the timing means it could not have been a normal spring hinge action, and the Salvatores are shown at least 2 feet away from it when it starts to move. In addition: in the very next shot when Damon walks past the door, it is back to being half open, and the shot after that the brothers walk out and Stefan slams the (now completely open) door shut. See more »


Halfway Gone
Originally by Lifehouse
Performed by Piano Tribute Players
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Lies, Betrayals and a Surprise
3 November 2013 | by (Rio de Janeiro, Brazil) – See all my reviews

After the arrival of Isobel, Jenna decides to leave Elena's house. Meanwhile Jeremy and Damon go with Bonnie to the house where Emily Bennet and one hundred witches have burnt to death to collect their power. Jeremy discovers that Bonnie has hidden the truth about the power she has acquired. Katherine steals the moonstone and Isobel abducts Alaric, betraying Elena, Damon and Stefan. Matt betrays Caroline with his mother. John finds that he has been lured by Isobel.

"Know Thy Enemy" is and episode with many lies, betrayals and a surprise in the end with the appearance of Klaus. Elena disappoints not getting rid off John when he offers the chance. My vote is seven.

Title (Brazil): "Know Thy Enemy"

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