Sophisticated British macabre comedy, The Battle of The Sexes(1959)
, based on James Thurber's short story, The Catbird Seat
, has mild-mannered, dignified Mr. Martin (Peter Sellers), as an infallible staid accountant at a archaic textile plant, trying to prevent a business takeover by a brash American efficiency expert, Mrs. Barrows(Constance Cummings).
Mr. Martin, a man who rarely speaks above a respectful whisper, envisions a plan to..um..terminate interloper Barrows. Robert Morley, as the permanently pouting and befuddled owner of the plant, is among the wonderful supporting cast.
This film has one of the sweetest endings I've ever seen. A little known Seller's film worth seeking out.