- Dr. Clive Riordan: Are you married, Mr. Finsbury?
- Supt. Finsbury: No... I've often thought about it. Trouble is, I've thought about it so long, I'm afraid I've missed the bus.
- Dr. Clive Riordan: Just one of life's little jokes, isn't it?... It points out our mistakes too late for us to profit by them.
- Dr. Clive Riordan: I've always wanted to meet a crime specialist.
- Supt. Finsbury: Interested in murder, Doctor?
- Dr. Clive Riordan: Well, in an amateur sort of way, yes.
- Supt. Finsbury: All murderers are amateurs, you know. Nobody makes a profession out of murder. In fact, the only professionals in the game are those who try and catch the murderers.