Now if there isn't a story in this...

Okay, it's possibly already been filmed in part, but some of the paranoid angles in James Jesus Angleton's (long-serving chief of the Central Intelligence Agency') wiki article would add an interesting spin to any novel. Take the Space/Macbeth idea, and then have the friendly Commander consumed with a search for an enemy squad in their lines. That doesn't sound so interesting written down anymore, but I'd make it work, dammit! Before they make it work against me...