If you're going to compare the Ballon household with a Shakespearean tragedy, I suggest that Macbeth would be more appropriate.
7 seconds sound clip from the A Shot in the Dark (1964) movie soundboard.
You can hear this line at 00:41:56.189 in the Blu-ray version of the movie.
Quote context
[...]
- True, she will suffer. But in the end she will be free and we will have our killer.
- Well, shall we settle this thing now, or do you intend making me late for the recital?
- We can't just fire her. She has given us no cause.
- Cause? We are up to our necks in dead bodies. What are you waiting for? The last act of Hamlet?
- That was Madame Ballon. Follow her. When you have discovered her destination, call me immediately.
- Good evening, Monsieur Ballon.
[...]