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Watching earlier episodes in season 1 helps you follow the plot and character arcs leading into this episode.

Watch I Know What You Did Last Summer Season 1 Episode 1 Online

Q: Where can I watch “I Know What You Did Last Summer” Season 1 Episode 1 online?

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“It's Thursday” — Watch "I Know What You Did Last Summer" Season 1 Episode 1 online in HD for free. Check streaming providers, cast, and episode details.

Oct 14, 2021 Season 1 Episode 1 50 min TV-MA

6.2 ★ ★ ★ ★ ★

11 votes

I Know What You Did Last Summer Season 1

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Season 1 Episode 1 — Aired on Oct 14, 2021 • runs about 50 minutes.

Directed by Craig William Macneill.

Written by Shay Hatten, Sara Goodman.

Notable cast/guest names in this episode include Madison Iseman, Bill Heck, Brianne Tju, Zeke Goodman.

This page includes 3 official still(s) (when available) plus legal availability links.

Looking for “watch I Know What You Did Last Summer Season 1 Episode 1 online”? This is a legal-only guide with synopsis, stills, and navigation for this season.

Synopsis

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.