Heaven Knows, Mr. Allison

Robert Mitchum is a World War II Marine sergeant and Deborah Kerr is a Roman Catholic nun. Both nun and sergeant are marooned on a South Pacific island, hemmed in by surrounding Japanese troops. Sergeant Allison does his best to make the nun's ordeal less painful, but is torn by his growing love for her. Sister Angela is equally fond of sergeant Allison, but refuses to renounce her vows. Their unrealized ardor mellows into mutual respect as they struggle to survive before help arrives.