Murder Ahoy (1964)
Miss Marple: Damn the torpedoes, full steam ahead, Mr. Stringer!
Miss Marple: Are you implying that I am unhinged?
Det. Insp. Craddock: No. No, of course not!
Miss Marple: Then what are you implying, pray?
Det. Insp. Craddock: Well, just that you are temporarily not yourself.
Miss Marple: Chief Inspector, I am *always* myself!
Captain Rhumstone: [testily] One thing I can't stand is being disturbed when I'm curling my beard!
Miss Marple: [to Craddock] Embezzlement is one thing - proof of triple murder is another. Softly, softly catches monkey in a mousetrap.