Murder Ahoy! (1964)

Miss Marple: Damn the torpedoes, full steam ahead, Mr. Stringer!

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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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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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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."
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.
Miss Marple was the 1931 Ladies' National Fencing Champion.
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