This reminds me of a nice concept from the Twilight Zone. In this particular episode, a woman is terrorized at night by strange, small things that have a metallic look. The woman is dressed as an old American settler/ranch woman. She tries everything she can to keep them out of her house, but they keep finding ways to get in. Out of desperate fear, she finally kills the little things and throws them outside, and at the end of it all, the camera show that the little metal things are USA astronauts who are part of a space exploration program from Earth.
Haven't seen it in awhile, so my description may be off quite a bit, but it's a good episode. Worth the watch ;)