TV-MASeason 1
No one is safe.
Synopsis
I Know What You Did Last Summer (2021), Season 1 — a mystery thriller you can watch online on iFILM, eight episodes of teen slasher set in a sun-bleached Hawaiian town that keeps its own secrets. The series reworks Lois Duncan's novel for a new generation.
Lennon Grant comes back from her first year at college, and that same night a message makes it clear: someone knows what she and her friends buried last summer. A graduation-night accident, a vow of silence, and now a debt coming due. The estranged crew pulls back together to hunt for whoever's threatening them — and the hunt only turns up corpses. They can't call the police without giving themselves away, so they untangle it alone while the body count climbs. Buried truths keep surfacing, including a few about Lennon's twin sister, and the suspect list narrows toward the people she trusts most.
Made for Amazon by Shawn Cassidy and Craig Macneill, the season runs tight and doesn't skimp on gore. It's built for fans of twist-heavy teen horror rather than slow-burn drama. Stream I Know What You Did Last Summer Season 1 online on iFILM.
8 episodes
S1·E1It's Thursday
Lennon Grant returns home after her first year at college and discovers that someone knows the terrible secret she and her OG crew of friends swore to keep last summer.
S1·E2It's Not Just for Dog Shit
The estranged friends reunite to try and figure who might have revealed their secret or who else knows what they did – which leads to murder.
S1·E3A Gorilla Head Will Not Do
Unable to go to the authorities without revealing their secret, the crew needs to solve the mystery on their own. More bodies turn up, as they realize they’re being haunted and hunted.
S1·E4Hot Shrimp Salad
Lennon uncovers secrets about her twin and begins to fear the worst about the true identity of the person murdering her friends. The local community is shocked by more murders.
S1·E5Mukbang
The police question everyone in town with any connection to the victims. The crew think they know who is after them and hunt for evidence implicating the town eccentric.
S1·E6Least You Had a Spare
More devastating truths are unearthed by Lennon as the crew frantically search for one of their own who has gone missing.
S1·E7If Only Dogs Could Talk
The town races to find the killer before another victim is claimed. Calm seems to be restored as the killing stops until the police make a gruesome discovery.
S1·E8Your Next Life Could Be So Much Happier
Lennon and her surviving friends confront painful truths from the past as the shocking truth of the killer's identity is finally revealed – with deadly consequences.
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