[[quoteright:349:http://static.tvtropes.org/pmwiki/pub/images/SummerTrilogy_4509.jpg]]
[[caption-width-right:349:Some people ''really'' don't know how to let things go...]]

->''"If you're going to bury the truth, make sure it stays buried."''


''I Know What You Did Last Summer'' (1997) is a horror/slasher film very loosely based on the novel of the same name by LoisDuncan, starring Freddie Prinze, Jr., Sarah Michelle Gellar, Jennifer Love Hewitt, and Ryan Phillippe. The screenplay was written by Kevin Williamson, one of the writers of ''Film/{{Scream 1996}}''.

The tale starts with a party and the consumption of too much alcohol, as these stories tend to do, during a beach party after Helen Shivers (Gellar) wins the Croaker County Beauty Pageant. On the way home, however, a drunken swerve of the friends' car leads to the death of a fisherman on the side of the road. The four decide to tell no one, and to forget the whole thing, throwing the body into the ocean. But somebody saw, and the next summer, they start to take vengeance, warning the four with an ominous message: ''[[TitleDrop I KNOW WHAT YOU DID LAST SUMMER]]''. Before long, people start dying, killed by a rain-slicker-clad figure wielding a hook...

''I Know What You Did Last Summer'' was followed by two sequels: ''I Still Know What You Did Last Summer'' (1998) and the straight-to-video ''I'll Always Know What You Did Last Summer'' (2006). For tropes applying to the original novel, see ''Literature/IKnowWhatYouDidLastSummer''.

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!!This movie contains examples of:
* AdaptationalAttractiveness: Else, Helen's sister, is described as very unattractive throughout the book. In the movie, she's just as pretty as Helen is.
** Elsa was written as plain looking in the script; the director decided that if Helen is gorgeous, Elsa should be too.
* ArtifactTitle: Hilariously, the second and third films still refer to "last summer", even though those events were multiple summers ago.
* AssholeVictim: The fine details are up for debate, but this is a slasher film that actually attempts to justify all the various teenagers getting killed; a hit-and-run probably doesn't deserve a RoaringRampageOfRevenge, but it's not the usual innocent batch of campers either.
** Max, in the first film, qualifies. His murder is completely random, as he was not part of the group involved in the hit-and-run.
* AudibleSharpness: The hook in the both movies. Even when it contacts nothing but air.
* BadassLongcoat: The fisherman's raincoat.
* BeautyContest: Helen wins one at the start of the first film.
* BehindTheBlack: Why [[spoiler: Ben doesn't see Julie waking up, picking up Ray's revolver from the ground and preparing to shoot him in the second film throughout the finale. Could be sort of justified, though, since Ben has just killed his son accidentally, so Julie waking up was probably the least of his concerns.]]
* BigBad: [[spoiler: Ben Willis in all three movies.]]
* BlackSpot
* BottomlessMagazines: In the second film Julie shoots the Fisherman eight times. With a six-shooter.
* TheCapitalOfBrazilIsBuenosAires: Lampshaded and subverted in the second movie as a plot point.
* TheCastShowoff: Jennifer Love Hewitt singing karaoke in the sequel. In addition to acting, Hewitt was also a pop star, enjoying a fair degree of success in, of all places, [[GermansLoveDavidHasselhoff Japan]].
* DarkSecret: The hit and run that starts the plot.
* DisposingOfABody: The characters did it last summer.
* FanService: Jennifer Love Hewitt in that tank top she wears for the final third of the first film.
** Also her wiggling around in the tanning bed in the second.
* FinalGirl: Julie in the first two films and Amber in the third.
* FromNobodyToNightmare: The Fisherman.
* GambitRoulette: The Fisherman's plan in the second movie involves sending Julie to an island resort full of people and ensuring that she would [[spoiler:become friends with his son and the "contest" to win the trip.]]
* GenreSavvy: When the girls go to visit the family of the man they killed, Helen says "[[SilenceoftheLambs Jodie Foster tried this and a serial killer answered the door.]]"
* TheGloriousWarOfSisterlyRivalry: Helen and Elsa.
* HookHand: The killer in the sequel has one of these. In the original movie, the killer carries a [[HooksAndCrooks gaffing hook]].
* HorrorDoesntSettleForSimpleTuesday: All three films take place around the Fourth of July.
* InNameOnly: The book and the first film share only character names and a hit-and-run that sets the plot in motion. Everything else is night-and-day; the Duncan novel is a mystery/drama, the film is a slasher.
** The third film is this to the first two as besides [[spoiler:lacking any of the other characters besides the Fisherman]] it [[GenreShift shifts into]] outright supernatural horror.
* ItWasHereISwear: Used repeatedly (and relentlessly). The most egregious example is the dead body and 400 crabs stowed in the trunk of one character, only to disappear equally suddenly.
** Not only does the body and crabs disappear within minutes, but the trunk's carpet is also pristine clean.
* JerkJock: Barry
* MistakenForMurderer: Julie in the first film [[spoiler: wrongly accuses Barry of having been the murderer all along.]]
* NastyParty
* NotQuiteDead: The Fisherman.
* OffScreenTeleportation
* OurGhostsAreDifferent: The Fisherman in the third movie, possibly some kind of LivingMemory.
* PeekabooCorpse: [[spoiler: Helen on ice.]]
* PickOnSomeoneYourOwnSize: Intergender example; the crazed fisherman is obsessed with killing Julie James and friends after [[spoiler:they hit him with their car. He got better.]]
* PoliceAreUseless: The inept cop in the first job who dismisses Helen as a hysteric [[spoiler: and ends up getting hooked himself.]]
* PreMortemOneLiner: In the second film:
-->'''Julie''': Just. Fucking. Die!
** In the third film:
-->'''Amber''': The secret. Dies. With YOU!
* PunnyName: Will Benson, [[spoiler: who was the son of the previous killer, Ben.]]
** Its even lampshaded.
* RadioContest: Subverted in ''I Still Know''.
* RedEyesTakeWarning: The Fisherman in ''I'll Always Know'', after TheReveal.
* TheReveal:
** ''I Know'': [[spoiler: The killer is Ben Willis (the guy the group actually hit) and not David Egan (who they thought they hit, and who Ben actually killed) or someone trying to avenge him.]]
** ''I Still Know'': [[spoiler: Will Benson is ([[PunnyName obviously]]) Ben's son.]]
** ''I'll Always Know'': [[spoiler: It's not a copycat, the killer is Ben, who has literally come back from the dead this time.]]
* RevengeBeforeReason: The Fisherman.
* RoaringRampageOfRevenge: The fisherman after he's left for dead in the first movie.
* SassyBlackWoman: Julie's college roommate in the first film.
* TheStinger: Someone is still trying to kill Jennifer Love Hewitt at the end of the sequel. According to Part 3, it's the Fisherman himself. After Jennifer killed him, he came back as a ghostly entity that looks like a zombie.
* TimeSkip: ''"One year later..."''
* TooDumbToLive: Helen and Barry.
* VillainBall: The Fisherman sure does pass up a lot of opportunities to kill those teens. Somewhat justified in the first movie, where his intent is not only to kill them, but to make them squirm and be afraid. Still, [[spoiler:Willis' quest for revenge threatens to expose his murder of David Egan, which he would've been clear of completely thanks to the teens]]. The second movie is arguably worse, where the Fisherman should know better by then not to mess around.
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