'I Know What You Did Last Summer' Ending, Explained: 2 Killers and a Surprising Mid-Credits Cameo

Late '90s nostalgia is back with a Gen Z twist in the new I Know What You Did Last Summer, a legacy sequel to the 1997 original and its 1998 follow-up. Like the Scream legacy sequel before it, the original of which kicked off the teen-slasher resurgence of the '90s, the latest I Know What You Did Last Summer is drenched in nostalgia and callbacks. It leads with a biting and campy sense of humor that the current generation will likely eat up, if the references to the past don't feel too old for their taste.
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