Murder Ahoy! (1964)

Miss Marple: [to Craddock] Embezzlement is one thing - proof of triple murder is another. Softly, softly catches monkey in a mousetrap.

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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!

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Captain Rhumstone: [testily] One thing I can't stand is being disturbed when I'm curling my beard!

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The screenplay was not based on any published Agatha Christie story. It did, however, borrow a few obscure plot details from "They Do It With Mirrors" and there is a delightful moment when Miss Marple pays homage to Christie's long-running play, "The Mousetrap."
A fifth Miss Marple film, based on Agatha Christie's 1942 novel "The Body in the Library", was mooted but never made.
Terence Edmond's appearance as Sgt Bacon partly capitalises on his then-recent rôle in Z Cars, where his policeman character PC Sweet had been shockingly killed off.
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