The African Queen

After Bible-thumping spinster Hepburn's missionary brother is killed in WWI Africa, hard-drinking, dissolute steamer captain Bogart offers her safe passage. Not satisfied with sanctuary, she persuades him to destroy a German gunboat blocking the British advance. The two spend most of their time battling aquatic obstacles and each other, rather than the Germans. Time alone on a African river turns mistrust and aversion to love, a transition effectively counterpointed by the continuing suspense of their daring mission. Classic war of the sexes script adapted from C.S. Forester's novel makes wonderful use of natural dialogue and humor. Shot on location in Africa.