I Know What You Did Last Summer backdrop

TV ShowEndedPrime VideoMysteryDrama

I Know What You Did Last Summer

2021 · 45m per ep · TV-MA · English · United States of America

In a sun-soaked Hawaiian town with a mysterious past, a group of friends is left with a dark secret after a tragic accident. One year later, a member of the group receives a threatening message, and the friends now know that someone intends to make them pay for last summer.

6.4(93 reviews)

6.1725% popularity

At a glance

Details

First air date: Oct 14, 2021
Last air date: Nov 11, 2021
Status: Ended
Seasons: 1
Episodes: 8
Episode runtime: 45m
Original language: English
Country: United States of America
Network / platform: Prime Video
Creator / showrunner: Sara Goodman
Certification: TV-MA
Production companies: Amazon Studios, Sony Pictures Television, Original Film, Atomic Monster, Off Center, Mandalay Television

Where to watch

Streaming availability has not been added yet.

Keywords

based on novel or booktwin sisterslashermurder mysteryhorror

Seasons & episodes

Season 1

2021 · 8 episodes

0 of 8 watched0%

Hide watched

Cast

Madison Iseman

Lennon / Alison

Bill Heck

Bruce

Brianne Tju

Margot

Zeke Goodman

Dylan

Ashley Moore

Riley

Fiona Rene

Lyla

Cassie Beck

Courtney

Brooke Bloom

Clara

Media

Reviews & ratings

6.4

93 community reviews

AR
Alex Rivera5.4/103/18/2026
Binge-worthy
Every episode leaves you wanting more. The character arcs are exceptional.
52 found helpful
JK
Jordan Kim6.4/103/14/2026
Peak television
One of the best shows in its genre — tightly written and beautifully acted.
44 found helpful
SP
Sam Patel7.4/103/10/2026
Must-watch series
The season finales alone are worth the watch.
36 found helpful
ML
Morgan Lee5.4/103/6/2026
Brilliant writing
Gripping from the first scene. Already recommending to everyone.
28 found helpful
CW
Casey Wong6.4/103/2/2026
Slow burn payoff
Takes a few episodes to hit stride, then it's unstoppable.
20 found helpful