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.
| Actor | Role |
|---|---|
 Barry NewmanBill Mathison | Bill Mathison |
 Anna KarinaAnna Bryant | Anna Bryant |
 Klaus Maria BrandauerJohann Kronsteiner | Johann Kronsteiner |
 Karen JensenElissa Lang | Elissa Lang |
 Joe MarossChuck | Chuck |
 Wolfgang PreissFelix Zauner | Felix Zauner |
 Helmut SchmidGrell | Grell |
 Udo KierAnton | Anton |
| MMischa HaussermanLev Benedescu | Lev Benedescu |
 Whit BissellJim Newhart | Jim Newhart |
 Raoul RetzerLarge Man | Large Man |
 Elisabeth FelchnerTrudi Seidl | Trudi Seidl |
 Bert FortellRugged Man | Rugged Man |
| AAdolf BeinlAnton's Companion | Anton's Companion |
 Patrick JordanRichard Bryant | Richard Bryant |
 Eduard LinkersTour Guide | Tour Guide |
| GGene MossAmerican Tourist | American Tourist |
| KKarl-Otto AlbertyFirst Stocky Man | First Stocky Man |
| RRudolf BarrySecond Stocky Man | Second Stocky Man |
 Christine BucheggerWaitress | Waitress |
 Johannes BuzalskiTelephon Technician | Telephon Technician |
 Ludwig HirschLiftboy | Liftboy |
 Kurt JaggbergKidnapper | Kidnapper |