Movie site Cinematical has a list of seven films with horror and science fiction elements. The post doesn’t really state that they’re considered the best SF/Horror films–and with Lifeforce as one of the entries I’m thinking there’s some bottom-of-the-barrel-scraping going on–but there’s no question that there’s seven of ’em, and they’re SF/Horror hybrids. If you’re planning a Halloween night movie marathon, take a look here for inspiration.