- Stephanie 'Steve' Clayton: [discussing an areal view of the desert] What DOES it look like?
- Dr. Matt Hastings: Oh, like something from another life. Serene, quiet, yet strangely evil as if it were hiding its secret from Man.
- Stephanie 'Steve' Clayton: You make it sound so, um... so creepy.
- Dr. Matt Hastings: The unknown always is.
- Prof. Gerald Deemer: The disease of hunger, like most diseases, well, it spreads. There are 2 billion people in the world today. In 1975 there'll be 3 billion. In the year 2000, there'll be 3,625,000,000. The world may not be able to produce enough food to feed all these people. Now perhaps you'll understand what an inexpensive nutrient will mean.
- Dr. Matt Hastings: Well, not many of us look that far in the future, sir.
- Prof. Gerald Deemer: Our business is the future. No man can do it on his own, of course. You don't pull it out of your hat like a magician's rabbit. You... well, you build on what hundreds of others have learned before you.
- Sheriff Jack Andrews: [viewing what's left of three dead cattle] Never saw anything like it.
- Andy Andersen: No footprints! No blood! No sign of a struggle! The bones just stripped clean like peeling a banana!
- Dr. Matt Hastings: But what if circumstances magnified one of them in size and strength, took it out of its primitive world and turned it loose in ours?
- Prof. Townsend: Then expect something that's fiercer, more cruel and deadly than anything that ever walked the earth.
- Dr. Matt Hastings: If there's anything a man hates it's to be told he's wrong when he knows he's right.
- Sheriff Jack Andrews: What have you got, Matt?
- Dr. Matt Hastings: I don't know, but we gotta keep our minds open and our mouths shut till we DO know.
- Dr. Matt Hastings: Listen, I'm just a country doctor, but I know what I know, and I know agromegalia doesn't turn up in four days out of left field.
- Joe Burch: A fine pal YOU turned out to be. I practically had the paper put to bed when I found out about Jacobs - by accident!
- [first lines]
- Airport Attendant: What's the score, Doc?
- Dr. Matt Hastings: Twins. Cutest things you ever saw.
- Airport Attendant: Hey, they're keepin' ya busy these days.
- Dr. Matt Hastings: The desert, it gives people wonderful ideas. Check the ship, will ya?
- Airport Attendant: You betcha.