Trivia: Plan 9 from Outer Space
- Beam Me Up, Scotty!: Eros never said "A particle of sunlight contains many atoms!"; the actual quote is "A ray of sunlight is made up of many atoms!".
- Common Knowledge: The flying saucers are actual toy flying saucers rather than the pie tins and paper plates that they're often mocked as.
- The Other Marty: Unwisely averted; the trope exists for a reason.
- The Shelf of Movie Languishment: Completed in 1956, released in 1959.
- Strange Minds Think Alike: This films has a lot of similarities with Invisible Invaders. In both films the aliens are scared about the humans experimenting with weapons of mass destruction and technology they don't truly understand, so they reanimate corpses in order to kill the living until humanity surrender. Both films were released in the same year and although 'Plan 9...' was filmed 3 years earlier, 'Invisible Invaders' appeared on theaters a month before. At first 'Invaders' got much better reviews and became a TV Cult Classic, but the film felt into obscurity while 'Plan 9' became a huge cult sensation in the 80's.
- Stunt Casting: Bela Lugosi, after he died, no less.