Our current Movie of the Month, 1985’s Lifeforce, finds screenwriter Dan O’Bannon returning to the retro sci-fi horror he revived to great success in Ridley Scott’s Alien (and, less famously, in John Carpenter’s Dark Star).  Just like in Alien, Lifeforce follows an unprepared crew of astronauts who are lured by a mysterious distress signal to a hostile alien landscape (in this case, on the surface of Halley’s Comet), where they’re hunted by the horrific creatures who inhabit it (in this case, soul-sucking nudist vampires).  By the time those creatures become stowaways on the space crew’s return to Earth, it’s clear that O’Bannon was recalling a very specific subgenre of Atomic Age sci-fi from his youth in both films; what’s unclear is what exact retro sci-fi titles he was referencing.

After revisiting Alien and watching Lifeforce for the first time this year, I did find myself curious about what Atomic Age sci-fi cheapies had influenced their shared tropes.  What I found was a group of cheap, quaint space travel pictures with a remarkable narrative overlap in O’Bannon’s screenplays.  Alien & Lifeforce are both updated to the modern horror tastes of their times, but there were plenty of retro space travel cheapies that mapped out the future details of their shared plot structure.  Here are a few recommended titles if you enjoyed our Movie of the Month and want to see the vintage prototypes for its distinctly 1980s mayhem.

It! The Terror from Beyond Space (1958)

You can’t ask for a much more straightforward, no-frills prototype for O’Bannon’s stowaway space alien invasions than It! The Terror from Beyond Space.  Even though the film’s rubber-masked pig-man is more adorable than scary, the way it hides in the rafters & crawl spaces of its Earthling victims’ spaceship is pure Alien.  It’s the kind of 1950s space travel thriller where the poster declares “$50,000 guaranteed by a renowned insurance company to the first person who can prove It is not on Mars now!” (despite the fact that It spends most of the runtime on a spaceship, not its Martian home planet).  It also laid out a roadmap to the kinds of stowaway alien invasion movies that O’Bannon would later emulate in his two biggest productions.

It!  The Terror Beyond Space even introduces its Earthling spaceship crew chatting around the dinner table, which is how audiences got familiar with the crew of Nostromo in Alien.  The stark difference here is that the women onboard the ship are mostly around to serve the men coffee at that table, and to tend to their wounds after the Martian creature attacks.  O’Bannon originally wrote Eleanor Ripley as a man, and his domineering nudist vampire villain in Lifeforce isn’t exactly the personification of Feminism, but you still have to credit him for giving his women characters something more to do than hang around as waitresses & cheerleaders.

Queen of Blood (1966)

In a lot of ways Queen of Blood is the least substantial of these Alien prototypes, if not only because it’s one of those AIP/Corman cheapies that were built out of Americanized scraps of better-funded, more imaginative Soviet sci-fi films — lurking among throwaway titles like Battle Beyond the Sun & Voyage to the Planet of Prehistoric Women.  It’s the one that most closely resembles the plot of Lifeforce, though, in that its stowaway alien invader is a wordless, beautiful woman who feeds on the blood of men like a vampire.  You’d think that of all the retro sci-fi films of this ilk this would be the one titled Planet of the Vampires—since Mario Bava’s own eerie Alien prototype doesn’t feature any actual vampires—but the title Queen of Blood is just as badass, so we’ll have to let that slide.

It’s hard to know exactly what to praise in Queen of Blood, since so much of its sci-fi spectacle is borrowed wholesale from the Soviet film Mechte Navstrechu, but its titular, green-skinned vampire queen is fabulous; she’s got a whole Juno Birch thing going on and it’s wonderful.  Not for nothing, but the film’s space crew also include prominent female scientists who actively save the day as the horndog men around them fall victim to the vampire, which is more than you can say for either Lifeforce or It!  The Terror Beyond Space.

The Green Slime (1968)

If you want to see the retro Alien prototype at its goofiest, you likely won’t do any better than 1968’s The Green Slime, a sci-fi creature feature collaboration between MGM and the Japanese studio Toei.  From its funky psych-rock theme song to its adorable X from Outer Space-style miniatures, to its slimy rubber monster, The Green Slime is pure kitsch.  Many of its plot details overlap with the specifics of Alien, though, despite that goofiness: its stowaway creatures’ lethally corrosive blood, its menacing stockpile of alien eggs, its doomed crew members’ refusal to adhere to proper quarantine protocol, etc.  You can practically picture little baby O’Bannon propped in front of his cathode-ray TV scribbling notes on how to tell an alien invasion story.

The Green Slime was mocked on the pilot episode for Mystery Science Theatre 3000, and it’s easy to see why they thought it left enough dead air for the show’s riffing to fill.  Its adorable old-school special effects work compensates for its lethargic pacing issues, though, and it’s the only film on this list that even vaguely resembles the batshit goofballery that O’Bannon would later indulge in Lifeforce.  It’s a shame that Lifeforce didn’t have its own titular theme song, though, since the one for The Green Slime is such a delight:

-Brandon Ledet