I'm gonna catch this killer.

Oh, and one other thing, young man.

And that automatically makes Grady the killer. Makes him a suspect... and a pretty good one.

And I'm sure no one will ever guess the uncle is the killer.

The killer saw the costume and assumed that McCallum was in that costume.

in choosing the pregnant ballerina as your killer.

Suppose the killer thought it was Captain Caleb.

And all the other "last nights" you've put me through.

One had been stabbed, and the other drowned. Absolutely not.

dependin' on who the killer thought he was killing.

Bet you whoever it was is the killer. Maybe.

Yeah, as a matter of fact, he is the killer. [Chuckling]

The question is, did the killer know that he was? What?

Now, suppose the killer didn't know that it was Mr. Baxendale.

The point is, the killer knew exactly who his victim was.

I mean, in that costume, the killer may have been after you.

Chasing around New York City alone, at night, maybe following a killer?

You must be a real book lover. To whom shall I inscribe them?

Uh, whatever made you think the uncle is the killer? Well, isn't he?

that, in the darkness, the killer thought he was firing at Captain Caleb.