After four soldiers are shot with bullets made of meteorites, an alien force compels them to work on a mysterious project.
Ballard learns that the alien project involves not only the soldiers, but a group of disabled children.
"This is troping power like nothing you've ever seen!"
- Compelling Voice: A rare heroic example. While the soldiers retain their personalities and wills, the alien influence forces them to work on the project, like it or not. As Renaldo puts it: "You do what's inside your head, no matter how your insides are busting!" Ballard notes that the soldiers "hate what they are doing even as they unwillingly do it.... [They] are tormented and unable to control themselves."
- Good All Along: While both the characters and the audience spend most of the story assuming that the aliens must be evil, the Twist Ending reveals that their goals are altruistic.
- Missing Time: After his encounter with Conover, Ballard winds up in Indianapolis two weeks later, with no memory of the intervening time.
- Multi-Part Episode: The only one in the original Outer Limits series.
- Well-Intentioned Extremist: The aliens subject the soldiers to a lot of psychological trauma for what turns out to be a benevolent purpose.