Lush period melodrama...
“Letter From an Unknown Woman” stars Joan Fontaine as Lisa Brendle, a Viennese teen who develops an infatuation with dashing concert pianist Stefan Brand (Louis Jourdan). Though Brand has no idea of Lisa’s interest in him, she continues to admire and long for him as she grows older. She even turns down a marriage proposal years later and returns to Vienna in the hope of reconnecting with Brand.<br /><br />The title of the film relates to three brief meetings Lisa describes in a letter to Brand — “By the time you read this letter, I may be dead.” Because he’s a womanizer, he has no recollection of the meetings, but startled by the opening sentence of the letter, Brand suspends his preparations to flee a duel to read the history of a love affair that he can’t remember.<br /><br />Directed by Max Ophuls, “Letter From an Unknown Woman” (1948) is typical of women’s pictures of the era, with its focus on Lisa and her unrequited love. Ophuls portrays her from the time she is a very young woman with a schoolgirl crush that most women outgrow as they mature. But Lisa allows her fascination to rule her life for years. Ms. Fontaine turns in an excellent performance and elicits sympathy, though some might regard Lisa as foolish for dedicating herself to a lost cause. Because Brand is egocentric and dalliances with females are common, Lisa is merely another pretty woman in a long line. Though the story is implausible, Lisa’s futile yearning for romance is complemented by terrific performances by the two leads and superb, lush production values. The film is rich in atmosphere that captures the feel of turn-of-the-20th-century Vienna.<br /><br />Bonus materials on the Blu-ray release include audio commentary by Max Ophuls expert Lutz Bacher; “A Deal Made in a Turkish Bath,” an interview with Oscar-winning documentarian Marcel Ophuls; “An Independent Woman Changing Sensibilities in Post-War Hollywood,” interview with Prof. Dana Polan; “Ophulsesque: The Look of Letter From an Unknown Woman” with cinematographers Ben Kasulke and Sean Price Williams; “Letter From an Unknown Woman: Passion’s Triumph,” a visual essay by film scholar Tag Gallagher; and an essay by Molly Haskell.
The movie title "Letter From an Unknown Woman (Olive Signature)," available on Movies & TV, has received an average rating of 4.6 from 196 reviewers. 
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Here is a brief synopsis of the title : Director Max Ophuls' classic tearjerker stars Joan Fontaine as Lisa Berndle, a woman in fin de siècle Vienna who has a one-night encounter with callous concert pianist Stefan Brand (Louis Jourdan), whom she's been infatuated with since she was a teen. Unknown to Brand, Lisa bears his son and marries another man, but a chance meeting years later leads to tragedy. With Marcel Journet, Mady Christians. 86 min. Standard; Soundtrack: English Dolby Digital stereo..