Yes, that episode was great. It was actually a two part episode. There was an under-current theme of overreacting to the unknown, as the paranoid town folk grabbed their guns and went hunting for the creatures and actually shot one of them. Turns out the little guys were actually peaceful, they just didn’t like oil rigs drilling down into their world below ground.I liked the episode where the little green subterranean men crawled out of the oil well. (It was in b&w, but I assumed they were green).
Of course humans were inhuman to them and Superman saved the day by taking them back to the oil well so they could return to their world and then sealed it up so it wouldn’t happen again.
Kinda like the space alien scenario