- Donald Chapman: [after the cops found the dynamite] There's others who feel like me - it don't make much difference what happens to me...
- Sgt. Joe Friday: Now you listen to me, you wide-mouthed punk, we've heard just about all we want from you.
- Donald Chapman: I know my rights. I know the law, too. You'll want to know a LOT more - a motive, for one thing.
- Sgt. Joe Friday: Hate'll do for a start, and you try to put that walnut-sized brain of yours to work on this: you keep harping about minorities.
- Donald Chapman: That's right.
- Sgt. Joe Friday: Well, mister, you're a psycho, and they're a minority too.
- Sgt. Joe Friday: This is the city, Los Angeles, California, geographically the biggest in the world... and still growing. Every day, the population increases by almost a thousand.
- [Friday and Gannon are interrogating Donald L. Chapman at his apartment after he had taken four cases of stolen dynamite with blasting caps and planted the resulting explosive somewhere]
- Officer Bill Gannon: You expect us to believe you've got a closet full of dynamite and you don't know how it got in there?
- Donald Chapman: How am I supposed to know? I hardly ever go into the closet.
- Sgt. Joe Friday: Never mind the smart answers, Chapman. We can bust you right here for Receiving Stolen Property.
- Donald Chapman: [cockily] So why don't you do it?
- Sgt. Joe Friday: Just tell us what you did with that dynamite.
- Donald Chapman: Maybe I'll change my mind. You said I don't have to talk to you. Maybe I won't.
- Sgt. Joe Friday: Narrating "... 400 pounds of dynamite were in the hands of a man who had already committed an irrational assault with a deadly weapon."