A scene from I Know What You Did Last Summer. (Columbia Pictures /Courtesy of Everett Collection)Is director Jennifer Kaytin Robinson's new slasher I Know What You Did Last Summer a reboot of the 1997 original or a sequel? To borrow a term from 2022's Scream, it's a "requel" - that is, something in between. Which means you'll see some legacy characters in addition to fresh faces, and once again, everyone's life is threatened by a slasher in a fisherman's slicker.Hooked yet? Warning: Major spoilers for the movie ahead.