Green for Danger (1947)
Dr. Barney Barnes: I gave nitrous oxide at first, to get him under.
Inspector Cockrill: Oh yes, stuff the dentist gives you, hmmm -- commonly known as "laughing gas."
Dr. Barney Barnes: Used to be -- actually the impurities cause the laughs.
Inspector Cockrill: Oh, just the same as in our music halls.
[dictating a report about the murder case]
Inspector Cockrill: "In view of my failure - correction, comparative failure - I feel that I have no alternative but to offer you, sir, my resignation, in the sincere hope that you will not accept it." Full stop.
Dr. White: I do hope everything can be arranged discreetly.
Inspector Cockrill: Umm, shouldn't think so for a moment.
Dr. White: Why not? Press? Do they have to be seen?
Inspector Cockrill: Can't keep 'em out.
Dr. White: Oh, dear.
Inspector Cockrill: I don't mind; they always give me a good write-up.