[answering the phone]

This is Monsieur Gadbois - who is this speaking?

Don't you know? Hmmm? Hmmm? Can't you guess? I'll give you a clue - this is the man who hates you. This is the man who more than anything else in the world would like to see you dead and buried!

...are you the headwaiter that works in the little bistro on the Rue de Bazaar?

No, this is Chief Inspector Dreyfus! Idiot!

You understand that anyone could ask for Monsieur Guy Gadbois and say that they were Chief Inspector Dreyfus. What is your code-name?

Code-name... CODE-NAME?! I've never had a code-name, lunatic!

Only the real Inspector Dreyfus would know that he did not have a code-name.