X the Unknown (1956)
Major Cartwright: You know this Royston chap - brilliant, of course, I'm sure - but the trouble with some of these scientific types is they can't see the easy way out of anything. It's got to be complicated if it's going to work.
Peter Elliott: How do you explain it, sir? All this extraordinary damage just to steal an old sample container?
Peter Elliott: What happened, sir? I don't understand.
Dr. Adam Royston: Peter, I'm afraid I don't either. Yesterday the material in that container was giving a danger-point radiation reading. Now, as you just saw, it's nothing.
Peter Elliott: But that's impossible! Isn't it?
Dr. Adam Royston: Yesterday I would have said yes, but this fact is inescapable: The energy trapped in that trinium has been sucked right out of it. And furthermore, these windows were barred and that door were locked all night. So, whoever it was came in here must be... most unusual.
Dr. Adam Royston: Now, Mac, how would you go about killing that?
Inspector McGill: What is it?
Dr. Adam Royston: It's a particle of mud, but by virtue of its atomic structure it emits radiation. That's all it is. Just mud. How do you kill mud?
Dr. Adam Royston: It's on its way for the biggest meal of its life.
Jack Harding: Dr. Royston, isn't it?
Dr. Adam Royston: Mr. Harding, how...
Jack Harding: There's nothing you can say will help. I know about you, Dr. Royston. You're a scientist, not a doctor. You don't look after the sick. You meddle with things that kill, like what killed my boy in there! You should be locked up in prison, locked up with others like you, letting off bombs you can't control. You're not safe. You're a murderer.
Dr. Adam Royston: [checking out entry points to an enclosed room] Came in through the grill.
Dr. Kelly: But, Adam, that's impossible. Whatever it was that did all this certainly wasn't small enough to come through there.
Dr. Adam Royston: Well, how small is ten thousand gallons of oil?
Inspector McGill: What do you mean?
Dr. Adam Royston: About ten thousand gallons of oil would take up a pretty large area, wouldn't it?
Inspector McGill: Ay.
Dr. Adam Royston: And yet ten thousand gallons of oil COULD come through the holes in that grill, couldn't it?