He Knows You're Alone (1980)

He Knows You’re Alone is one of those early slashers that’s better than its reputation, taking a simple “wedding-day dread” hook and squeezing real suspense out of it with sharp pacing and a genuinely creepy, urban-nightmare atmosphere. The film doesn’t just stack bodies; it gives you likable, believable characters and performances that make the danger feel personal, while the direction keeps tightening the screws without resorting to cheap confusion. There’s a hard-boiled, wounded-cop streak running through it that adds grit and momentum, and the opening grabs you with the kind of confident chill that most imitators only wish they had. It is, admittedly, a familiar recipe for genre veterans, but if you want a solid, well-made slasher that knows how to build tension and deliver an entertaining ride, this one earns its seat at the table.

He Knows You’re Alone is clearly aiming to ride the early-’80s slasher wave with a simple, bridal-themed hook and a “race against time” cop subplot to give it some urgency. The problem is it often feels like a Halloween photocopy: the beats are familiar, the suspense is more routine than nerve-shredding, and the direction rarely finds a distinctive style to make the stalking genuinely scary. If you need sharp dialogue, tight logic, or a memorable finale, this may test your patience, because it coasts on predictability and leaves a few holes you’ll notice. Still, there’s a solid opening, a bit of time-capsule charm (including an early Tom Hanks sighting), and it can work as low-stakes background slasher fare if your expectations are set accordingly.