On the eve of World War II, the German Kurt Müller, his American-born wife Sara, and their three children, having lived in Europe for years, visit Sara's wealthy mother near Washington, DC. Kurt secretly works for the anti-Nazi resistance. A visiting Romanian count, becoming aware of this, seeks to blackmail him.
Unfortunately the movie Watch on the Rhine is not yet available on HBO Max.
| Writing | Dashiell Hammett | Screenplay |
| Writing | Lillian Hellman | Theatre Play |
| Directing | Herman Shumlin | Director |
| Art | Julia Heron | Set Decoration |
| Production | Jack L. Warner | Executive Producer |
| Directing | Richard Maybery | Assistant Director |
| Sound | Max Steiner | Original Music Composer |
| Camera | Merritt B. Gerstad | Director of Photography |
| Sound | Dolph Thomas | Sound |
| Camera | Hal Mohr | Director of Photography |
| Art | Carl Jules Weyl | Art Direction |
| Costume & Make-Up | Orry-Kelly | Costume Design |
| Production | Hal B. Wallis | Producer |
| Editing | Rudi Fehr | Editor |
| Directing | Ridgeway Callow | Second Assistant Director |
