I Know What You Did Last Summer is the first episode of the Fifth Season and the ninetieth episode in the series.


The Vampire Diaries - Season 5 Premiere Promo00:31

The Vampire Diaries - Season 5 Premiere Promo


COLLEGE DAYS — After spending the summer enjoying her passionate relationship with Damon, and making sure that Jeremy is adjusting after his return from the dead, Elena is thrilled to move into the dorm at nearby Whitmore College with her new roommate, Caroline. Still believing that Bonnie has been traveling all summer and will soon join them, Elena and Caroline are surprised when a student named Megan shows up and announces that she will be sharing their dorm room. Katherine makes an unexpected appearance at the Salvatore house and pleads with Damon to help her now that she is human and vulnerable to her enemies. Matt and Rebekah return to Mystic Falls after spending a wild summer in Europe, where they met a mysterious beauty named Nadia. Elena can’t shake the feeling that something is wrong with Stefan, and Silas makes a terrifying appearance at the “End of Summer” party in the town square.



Main CastEdit

Recurring CastEdit

Guest CastEdit



Comic-Con Promo

Silas: "This summer, I have consumed an immeasurable amount of blood and I found myself getting stronger and stronger everyday and I started to wonder what are the limits to my powers. How many people can I influence? Two? Ten? An entire town square?"

CW Promo's

Silas: "Hello my shadow self." (to Stefan)
Stefan: "Silas..."
Elena: "I love you." (to Damon)
Damon: "And I love you."
Katherine: "It's been a long summer, Damon."
Damon: "Katherine."
Silas: "Human looks better on you then I would've thought, Katherine."
Damon: "If I have to hear "doppelgänger" one more time, I'm gonna have to learn how to spell it."

Elena: (To Caroline) "To us, and college. And being functional vampires."
Caroline: "We're here."
Bonnie: "We're all here together."
Damon: (To Silas) "Where's Stefan?"
Silas: "He's suffering. Like I suffered."

Webclip 1
Damon: You okay?
Elena: Yeah, I've just got this feeling like something bad's about to happen.
Damon: Well, it is. You're leaving tomorrow. You're trading all this for communal showers and a meal plan.
Elena: Can't you just be a normal boyfriend and support me as I attempt to have a normal college experience?
Damon: I'd rather ply you with champagne, and spend the night convincing you to stay.

Webclip 2
Jeremy: Caroline says 'Get your ass in Whitmore, Bonnie. We need you'.
Bonnie: Just tell her I'm at the Grand Canyon.
Jeremy: You realize you just postponed the inevitable, right? What happens when your dad finds out you've been dead all summer?
Bonnie: How many postcards have I sent him? How many times has he called? I've done enough, he's clearly not missing me.
Jeremy: What about Elena?
Bonnie: I just saw her at college. She's been genuinely happy. I am not taking that away from her. We're lucky, Jer. How many people die and still get to talk to their best friends?
Jeremy: How many best friends can't feel each other? I should get going. The freak who faked his own death can't also be late for Math.

Episode QuotesEdit

Stefan (as Narrator) : "...but our greatest threat is still out there...and he"
Bonnie (as Narrator) : "If Katherine Pierce ingesting the only cure on this Earth and having to live as a Human isn't justice...I don't know what is."
Jeremy (to Bonnie) : "It's bad enough you're dead, now you're a control freak?"
Damon (to Elena) : "You're leaving! You're going to college, you're going to drink cheap beer and you're going to protest about things you don't care about."
Elena (to Caroline) : "To us...and college and being functional Vampires."
Jeremy (to Bonnie) : "I should get going. The freak who faked his own death, can't also be late for math."
Rebekah (to Matt) : "Five-star restaurants in Paris to tapping kegs in a park...tragic."
Rebekah (to Matt) : "Tell him we had a threesome, he'll understand."
Caroline (to Elena about Megan) : "She has an entire drawer dedicated to organic linen."

Katherine (To Damon) : "It's been a long summer, Damon."

(Katherine is drinking Damon's alcohol)
Katherine: "You're gonna have to cut me off soon. My tolerance is a joke now. It's just so...glorious."
Damon: "You're miserable."
Katherine: "Please. I'm Katherine Pierce. I'm a survivor."
Damon: You're a liar. Your hair is messed up, your nails are chipped. You're a sad, miserable human being and you want me to turn you. So, here. (Damon bites his wrist and offers it to Katherine) Go ahead. Drink up. I'll kill you, you'll bite the mailman, and you'll be a vampire again. Go ahead. Come on."
Katherine: "I can't, okay? No one's ever taken the cure before. If I die, there's a good chance I may never wake up."
Damon: "And that would be tragic."
Katherine: "And deep down in that mushy, gushy Elena-loving heart, there's a part of you that doesn't want me to die."

Damon: "If I have to hear the word "doppelgänger" one more time, I think I'm gonna actually have to learn how to spell it."
Silas: "You say you don't believe me, and yet you're mind is spinning at the possibility."
Damon: "A, get out of my head; B, I think I'd know if my little brother had an evil twin."
Silas: "Oh, we're not twins. See, when I became truly immortal, nature retaliated by creating a version of me that was kill-able. It's called a shadow self."
Damon: "Well, whatever you are, your plan didn't work. The cure's gone. Now what do you want with Katherine?"
Silas: "I could tell you, but wouldn't be so much more fun if it were a surprise?"
Damon: "You're not getting her."
Silas: "Damon, how well do you know your brother? Do you really think he would leave town for three months without so much as a phone call so you could live happily ever after with the love of his life? Or did you just delude yourself into thinking it would be that easy?"
Damon: "Where's Stefan?"
Silas: "He's suffering, like I suffered. So, call the hunter, bring me Katherine, and then I will tell you where your little brother is."

Katherine: "I have enemies everywhere. What happens when word gets out that I'm a human? I can't protect myself. I'm weak and I'm slow. Do you have any idea what it's like to run in heels? I have blisters!"

Damon: "One day. One day where you don't screw it up."
Jeremy: "Leave me alone, Damon."
Damon: "You're lucky you didn't put one of those idiots in ICU."
Jeremy: "Says the guy that once killed me."
Damon: "Yes! In the privacy of your own home. Away from prying eyes. Unlike you, who went all hunter in the middle of the hallway. You got expelled, genius."
Jeremy: "Does that mean I don't have to go back to school?"
Damon: "I compelled Principal Webber into a very generous 3-day suspension. Elena does not need to know about this."


  • Antagonists: Silas, Nadia and Gregor.
  • First appearances of Nadia, GregorJesse and Megan.
  • With its 7 words (25 letters), this episode has the third longest title after We'll Always Have Bourbon Street and We All Go A Little Mad Sometimes.
  • Katherine and Silas meet for the very first time. Although Katherine awoke him in Down the Rabbit Hole by letting him feed on Jeremy, Silas wasn't conscious.
  • This episode featured the first same-sex kiss (between Rebekah and Nadia).
  • Silas reveals to Damon that Stefan is "suffering" as he did.
  • Silas is shown to not have some of the other skills that vampires do - such as super-speed.
  • Silas proves he has no fangs as he claims he is immortal, but not a vampire.
  • Silas hints that he truly hates vampires. He deems them to be "disgusting perversions" of a true immortal like him.
  • Damon offers Katherine his blood to turn her into a vampire again, but she declines his offer out of fear of actually dying. She wonders if because of the cure, which may have granted her immunity to vampirism, she might die as human even if she had vampire blood in her. So she won't take the chance.



Behind the ScenesEdit

Cultural ReferencesEdit



Last.fm_play.png "Unbelievers" – Vampire Weekend
Last.fm_play.png "Royals" – Lorde
Last.fm_play.png "Falling" – Amy Stroup
Last.fm_play.png "Pumpin Blood" – NONONO
Last.fm_play.png "Dreaming" – Smallpools

Last.fm_play.png "Destroy" – In-Flight Safety
Last.fm_play.png "Here We Go Again" – Johnny Stimson
Last.fm_play.png "Time" – The Fast Romantics
Last.fm_play.png "Run Away" – Cary Brothers





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