An American lawyer on vacation in Europe is asked by a book publisher to stop by the Austrian town of Salzburg to see a photographer who's taking pictures for a book on picturesque Austrian lakes. Upon his arrival he senses that something is wrong when the photographer seems to have vanished, leaving a near panic-stricken wife and a sinister, secretive brother. Before he knows it, the lawyer finds himself mixed up with spies, assassins, and the hunt for a list made up by the Nazis during World War II of people who collaborated with them.
| Directing | Lee H. Katzin | Director |
| Production | Ingo Preminger | Producer |
| Sound | Bronislau Kaper | Original Music Composer |
| Editing | John Woodcock | Editor |
| Camera | Wolfgang Treu | Director of Photography |
| Art | Hertha Hareiter | Art Direction |
| Costume & Make-Up | Lambert Hofer Jr. | Costume Design |
| Writing | Oscar Millard | Screenplay |
| Writing | Helen MacInnes | Novel |
| Writing | Edward Anhalt | Screenplay |
