I Know What You Did Last Summer Movies: Original Trilogy
This watch order follows the original I Know What You Did trilogy released between 1997 and 2006. The first two films center on Julie James (Jennifer Love Hewitt) and Ray Bronson (Freddie Prinze Jr.) as they survive encounters with Ben Willis, the vengeful Fisherman seeking retribution for a hit-and-run.
The 2006 movie I'll Always Know What You Did Last Summer shifts to an entirely new cast in Colorado, though it maintains the Fisherman legend established in the earlier films. While disconnected from Julie and Ray's story, this third entry technically exists within the same universe where the hook-wielding killer's legend continues to claim new victims.
There are 2 other watch orders available - see the links up above.

I Know What You Did Last Summer
Four teenagers attempt to cover up a deadly car accident, but a year later they find themselves being stalked by a mysterious hook-handed killer who knows their dark secret.

I Still Know What You Did Last Summer
A year after surviving a deadly encounter with the Fisherman, Julie James tries to escape her trauma with a trip to the Bahamas, only to discover that her nightmare isn't over.

I'll Always Know What You Did Last Summer
A group of teenagers in a small Colorado town cover up their friend's accidental death during a July 4th prank gone wrong. A year later, someone begins stalking and threatening them, determined to keep a local legend alive through deadly revenge.
Other Film Series
Invasion of the Body Snatchers
Four films exploring alien pod people replacing humans, each updating the concept for different eras and anxieties.
Nightmare on Elm Street
The iconic horror franchise following the burned child killer Freddy Krueger who stalks teenagers through their dreams.
Scream
A meta-horror franchise following Sidney Prescott and others as they face various Ghostface killers, known for its self-aware commentary on slasher film tropes.
The Conjuring Universe
Supernatural horror franchise following paranormal investigators Ed and Lorraine Warren and their haunted cases.
The Ring
A cursed videotape kills anyone who watches it seven days later, spawning one of the most influential horror franchises across Japanese, American, and Korean cinema.
Unbreakable
M. Night Shyamalan's grounded superhero trilogy following ordinary people who discover extraordinary abilities, culminating in an unexpected crossover.
