Jonathan Brewster: [to Aunt Abby and Aunt Martha] Dr. Einstein and I need a place to sleep. You remember that, as a boy, I could be disagreeable. It would not be pleasant for any of us if... I don't have to go into details, do I?

Jonathan Brewster: [to Dr. Einstein] This is the home of my youth... As a boy, I couldn't wait to escape from this house. Now, I'm glad to escape back into it.

Jonathan Brewster: [to Dr. Einstein] This time, I want the face of an absolute non-enity!

Jonathan Brewster: [to Dr. Einstein] To my dear dead brother.

Jonathan Brewster: I'll get every one of you! I hate cops! I'll brain the first one that comes near me!

Jonathan Brewster: Perhaps we'd better introduce ourselves. May I present Dr. Einstein.
Elaine Harper: Dr. Einstein?
Jonathan Brewster: A surgeon of great distinction... and something of a magician.
Elaine Harper: Now, I suppose you're going to tell me that you're Boris Kar...
Jonathan Brewster: I am Jonathan Brewster!

Jonathan Brewster: Tonight, we are taking care of Mortimer.
Dr. Einstein: But, Johnny, not tonight. I'm sleepy. We'll do it tomorrow, or the next day.
Jonathan Brewster: Look at me, Doctor. You can see that it's got to be done, can't you?
Dr. Einstein: Yeah, I know that look.
Jonathan Brewster: It's a little late to dissolve our partnership.
Dr. Einstein: Okay, okay, Johnny. Okay, we'll do it. But the quick way, huh? The quick twist like in London.
Jonathan Brewster: No, Doctor. I think this calls for something special. I think, perhaps, the Melbourne method.
Dr. Einstein: [cringing] No! Not the Melbourne method, please! Two hours!

Jonathan Brewster: We're moving the car behind the house. You'd better get to bed.
Martha Brewster: The car is alright where it is until morning.
Jonathan Brewster: I don't want to leave it in the street. That might be against the law.

[after finding the dead body in the window seat]
Mortimer Brewster: But - what happened to him?
Martha Brewster: [cheerfully] He died.

[after listening to Mortimer's description of a character in a play]
Dr. Einstein: You know, you were right about that fellow. He wasn't very bright.