The Vampire Diaries Episodes

2009, TV Show

The Vampire Diaries Episode: "Know Thy Enemy"

Season 2, Episode 17
Episode Synopsis: Isobel arrives unexpectedly and kidnaps Alaric and Elena. Meanwhile, Bonnie tries to increase her powers by harnessing the energy of former witches who were sacrificed, and Katherine steals the moonstone that is the key to the vampire-werewolf curse.
Original Air Date: Apr 7, 2011
Guest Cast David Anders: John Gilbert Mia Kirshner: Isobel
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Season 2, Episode 17
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Length: 10:44:54
Aired: 4/7/2011
Also available on Amazon Instant Video and VUDU
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The Vampire Diaries Episode Recap: "Know Thy Enemy" Season 2, Episode 17

On this week's The Vampire Diaries, Elena and Alaric are upset with John about Isobel's unexpected arrival, which leaves Jenna devastated. Meanwhile, Matt mulls the new information that Caroline is a vampire, and that one of her blood-sucking brethren killed his sister Vicki.

Isobel is back, which immediately throws Jenna for an emotional loop. Jenna retreats to campus, while John invites Isobel in to share whatever intel she has on Klaus. She explains that because there's a rumor that the doppelganger exists, vamps will be searching for Elena in order to get in Klaus' good graces. Isobel says she wants to keep Elena safe, but Elena isn't buying it and wants her gone.

Bonnie, Jeremy and Damon go to the house where the Salem witches died in order for Bonnie to harness their powers. After Damon receives a very unwarm welcome, he exits, leaving Jeremy to witness Bonnie in her element. Although the sight of her screaming worries him, she says the spell worked and she gained their powers. But she leaves out a very important fact: She also learned how to kill Klaus, a spell that involves Bonnie using so much power that she'd likely die in the process.

Isobel finds Katherine and it turns out the girls are BFFs. Isobel says she's made a deal with Klaus to save Katherine's life, and that she's found her way into his trusted circle with one of his witches, the same witch who then kidnaps Alaric.

Back at home, a shirtless Damon realizes that the moonstone is gone. Considering that he hid it in the soap jar, he shouldn't be surprised Katherine found it.

At the historical society, Isobel bites John's neck, sending him down the stairs, the commotion of which distracts everyone from Elena's sudden absence. Isobel has taken her to the cemetery where Isobel's grave is located. She gets a call from that mysterious witch who's working with Klaus and learns that her job is done. He now has the moonstone that Isobel tricked Katherine into getting for them, and the doppelganger, aka Elena, will remain safe. "I'm sorry I was such a disappointment to you," Isobel tells her daughter, before removing her necklace and then burning up in the sun. One major death down; two to go.

Caroline arrives home to find Matt. He says he needs to know more about Vicki, but once she spills, it's too much for him to handle. He asks her to compel him to forget, which she thinks she does, but it turns out he has vervain in him and is temporarily immune to her compulsion. He leaves the house and goes to see Caroline's mom, who had told him to find out everything he could about her daughter being a vampire. "I feel like she died," Matt says to Sheriff Forbes. "She did," Liz responds.

Back at the house, Elena asks John why he trusted Isobel. He explains that not only was he there when she gave birth to Elena, but that he was the first girl he ever loved. "I will do whatever you want me to do," he says, explaining he'll even leave if it would make her feel safer. "Everything you touch falls apart," Elena says to John. "But you're the only parent I have left. So maybe I can learn not to hate you."

In the final scene, Katherine wakes up to witness a spell taking place. She looks up and it's Alaric. But as soon as he speaks, she realizes it's Klaus who has now taken over his body.

What did you think of the episode? Do you trust John? Will Bonnie risk her life for the sake of everyone else? Comment away!

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On this week's The Vampire Diaries, Elena and Alaric get upset with John when Isobel's unexpected arrival leaves Jenna devastated. Meanwhile, Matt must decide what to do with the information that not only is Caroline a vampire, but that his sister Vicki was killed by one.

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Premiered: September 10, 2009, on CW
Rating: TV-14
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Premise: A Virginia high-school student falls for a new boy in class who is actually a centuries-old vampire struggling to live peacefully among humans. Based on the young-adult book series by L.J. Smith.

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