This episode of "The Invaders" takes David to a small town in the geographic center of the United States*. He arrives there because a local school teacher was quoted in the newspaper saying that she saw some metallic box that controlled the locusts...and that sure sounds like alien technology! However, when he arrives, the locals are amazing unfriendly. At first, it looks as if they are just being protective over the teacher, as she's very fragile emotionally. But, of course. Over time it's obvious the aliens are behind this wall of silence.
While this is an odd plot, it is an interesting one. The aliens apparently want to use the insects to kill people...to possibly depopulate the Earth. A fascinating story and one well worth seeing.
*In this geographic center of the US (which is actually Lebanon, KS), you can see mountains in the distance. Well, in the approximate middle of Kansas there are no nearby mountains...none. Like most TV shows, this was actually filmed in California. And, like another Quinn Martin series, "The F. B. I.", I saw similar geographic mistakes...such as an episode set in the Chicago area...with mountains! There certainly are no mountains near Chicago but California is full of them!