[Joy is upset that her affair with David is over, and is talking to Frank about it]
Frank: My mum used to say that every woman should love at least one bad man, so that she'll know the difference when a *good* man comes along.
Frank: Joy is a decent, kind young woman - qualities that an unscrupulous so-and-so might take advantage of.
David: I assume you're aware that she's in the country illegally. If the authorities were to find out, it wouldn't just be *her* that would be in trouble.
Frank: Doctor Mitchell, do you still swear the Hypocratic Oath?
David: [puzzled] Yes.
Frank: Whatever happened to "do no harm"?