I imagine the conversation between director Greydon Clark and his producers went something like this:
Clark: The story is about a demon cat, stuffed inside of a house cat. The Demon Cat then claws its way out of the house cat and kills people on a yacht. Then it claws its way back into the house cat.
Producers: How did the demon cat get inside of the house cat?
Clark: That's not really important. Science gone wrong type shit. Or something.
Producers: Why is there a cat inside of a cat? Wouldn't it be better if the cat just morphed into a demon then morphed back into a regular house cat?
Clark: No, that wouldn't be better.
Producers: Why?
Clark: Because it wouldn't.
Producers: So… since this demon cat is inside of a regular cat, the demon cat is probably really tiny, right?
Clark: Nah… It's about the size of a Rottweiler. Or a 14 year old boy. Or a ferret. It grows once it gets outside the cat.
Producers: How?
Clark: That's not really important.
Producers: Why does the cat kill people? On a yacht no less.
Clark: Because it's a demon. Duh. And it poisons their food. And their blood. And makes the people explode in bloody puss filled boils.
Producers: How does it do that?
Clark: That's not really important.
Producers: But maybe it is?
Clark: Trust me. It's not.
Producers: Who's in this movie?
Clark: Hot chicks who can't act.
Producers: But they show their tits, right?
Clark: Oh no, absolutely not.
Producers: Uh… Greydon… the general rule of thumb here is hot chicks who can't act, who show up in horror movies, kind of have to show their tits. Hot chicks who can act… they have the option of keeping their tops on. Though we strongly encourage them to show their tits as well.
Clark: Whatever. Not happening. Not here. So can I get the 800 bucks to make this movie or what?
Producers: Well, it's not looking good. Anybody else in this movie?
Clark: I got George Kennedy to sign on.
Producers: Dude. Why didn't you just lead off with that? Consider yourself greenlit!
And thus the masterpiece knows as 'Uninvited' is born. One of the worst movies ever made, were it not for a cat stuffed inside of a cat which kind of transforms it into one of the most awesome movies ever made.
There are a few things to look out for in this classic, such as George Kennedy's performance. He was SUPER pissed off in this movie. I think he was using the Method technique and channeling the anger he was feeling towards his agent and using it in this movie. He nailed it!
Observe Martin the exposition guy with the Biology degree. This dude is smart enough to turn a sextant into an electron microscope. But earlier when he stumbles upon a cat in trash can, with a genetics lab collar on him, a cat he correctly assumes has escaped from this lab, he has no objections to people carting this cat with them everywhere they go. I don't expect Martin to know that there's a demon cat stuffed inside this cat, but Martin, working on his doctorates in biology, should assume that this cat has more than likely been injected with something that would require isolation, followed by a quick call to that number on the collar so these people can get their virulent cat back.
Martin's stupidity leads us to the bimbo Rachel, the 'We All Gonna Die Guy' in this movie. She is the chick who is actively responsible for bringing the cat on the trip. After the cat goes apeshit and starts murdering people, Rachel feels people are going to blame her for bringing the cat on board, until she figures Martin should've known better to let her do this. I know we're supposed to see Rachel's delirious claims as unreasonable, but girlfriend is right on target here. Rachel also dies via death by corn flake. Which I don't think has ever happened in cinema before.
Have you ever wanted to see a cat, inside a cat, eat kids who can't act and a super angry Academy Award winner? You know the answer is yes. And 'Uninvited' is the only path you can take to get to that wonderful place.
