De film gaat over verschillende flashbacks die getoond worden aan de hand van de brief van Lisa, die Stefan leest vlak voordat hij eigenlijk zou vertrekken richting een duel (in Wenen anno 1900).
Nee, helaas is Letter from an Unknown Woman nog niet beschikbaar op Netflix in Nederland.
| Production | William Dozier | Executive Producer |
| Camera | Franz Planer | Director of Photography |
| Sound | Daniele Amfitheatrof | Original Music Composer |
| Production | John Houseman | Producer |
| Writing | Stefan Zweig | Author |
| Writing | Howard Koch | Screenplay |
| Costume & Make-Up | Travis Banton | Costume Design |
| Editing | Ted J. Kent | Editor |
| Art | Ruby R. Levitt | Set Decoration |
| Art | Alexander Golitzen | Art Direction |
| Sound | Glenn E. Anderson | Sound Designer |
| Sound | Leslie I. Carey | Sound Designer |
| Directing | Max Ophüls | Director |
| Art | Russell A. Gausman | Set Decoration |
| Writing | Stefan Zweig | Novel |
| Costume & Make-Up | Virginia Tutwiler | Wardrobe Designer |
| Lighting | Tex Bellah | Best Boy Electrician |
| Art | Wally Kirkpatrick | Props |
| Camera | Roland Smith | Grip |
