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So, no horror movies that had a resolved narrative by the time the credits rolled, e.g. Silver Bullet, The Burning or John Carpenter’s The Fog, which doesn’t count as a franchise since the only other film is a remake many decades later.
1) Alligator

Alligator is both a rock-solid monster movie and a highly enjoyable take down of particularly self-serving members of the one percent. The plot follows a little girl who adopts an alligator from an alligator farm only for her alcoholic father to flush it down the toilet in a rage. There, the gator grows to a massive size, at which point it breaks out of the sewer and goes on a rampage across Chicago.
We spend most of our time with Robert Forster’s Detective David Madison and Robin Riker’s Dr. Marisa Kendall, who just so happens to be the little girl who adopted the gator in the beginning. After the gator has devoured an attention-seeking big-game hunter and seriously ruined a high-society wedding, Madison and Kendall lure it back to the sewers and kill it with explosives. But, while we’re still down there in the sewers, we see another little baby gator, who has apparently also been flushed. Even if the sequel hadn’t included Forster and Riker (both of whom deliver excellent performances), it would have been good to see some more actually well-done gator carnage. Alligator could have been incredibly silly. Most films involving antagonist gators or crocodiles are. But Alligator pulls off a hat trick by walking a fine line between horror, action, and comedy. It works, and with the same creatives behind the camera (namely director Lewis Teague and writer John Sayles) it could have worked twice.
Stream Alligator on Prime Video.
2) My Bloody Valentine

My Bloody Valentine has a pretty grim ending, and it should have been explored further. It’s odd it wasn’t, too, because not only does the ending directly set up a sequel, but it’s also a holiday slasher movie that actually performed fairly well at the box office.
It wasn’t a blockbuster, as it only generated less than one third the profit domestically that Friday the 13th did the previous year, but Paramount still made money on it. It would have been interesting to see how far Axel Palmer, now fully insane and short one arm, could have gotten after climbing out of the mine that served as his Camp Crystal Lake. Perhaps if Paramount knew that My Bloody Valentine would have become one of the ’80s most respected slashers (it even did okay with critics), it would have funded at least one sequel. And one sequel was really all it would have needed. Fortunately, the movie’s ending still works within a one-off narrative. The audience is forced to wonder about Axel and his whereabouts after the credits have rolled.
Stream My Bloody Valentine for free on Kanopy.
3) Curtains

In Bob Clark’s 1974 classic Black Christmas, Lynne Griffin played a member of a sorority who is attacked by a mysterious man and left in the sorority house’s attic with a plastic bag over her head. That’s where she remains throughout the movie. Griffin returned to slasher territory with the highly underrated Curtains, but this time she wasn’t the victim, she was the assailant. Both of these movies end with the antagonist alive and (physically) well, and both could have received a sequel.
In other words, consider this lobbying for both Black Christmas and Curtains. But at least Black Christmas has received two very loose remakes. Curtains, however, has been mostly forgotten. For the uninitiated, the plot follows a group of female actresses who have gathered to audition for a role in a film called Audra. One by one the actresses are picked off by someone in a “hag” mask, including one while she is ice skating (in what is undoubtedly the film’s most famous scene, for good reason). Technically, there are two killers, with Samantha Eggar’s Samantha Sherwood shooting both director Jonathan Stryker and his lover, Brooke, who has replaced Samantha as the recipient of his affections. The rest of the deaths are by the hand of Griffin’s stand-up comedian Patti O’Connor, who spends the final scene performing a monologue from Audra for her fellow patients in a psychiatric hospital.
Stream Curtains on Prime Video.












