On a train's way to the Italian Alps, the jewelry of a wealthy young widow is stolen and a military veteran working as a waiter is the first to come under suspicion.
| Actor | Role |
|---|---|
 Charlotte SusaLisa von Hellwitz | Lisa von Hellwitz |
 Karl Ludwig DiehlHans Lenzfeld | Hans Lenzfeld |
 Ralph Arthur RobertsPrinz Tarnoff | Prinz Tarnoff |
| RRichard RomanowskyProf. Eberhard Degenfeld | Prof. Eberhard Degenfeld |
 Angelo FerrariNot listed | Not listed |
 Trude HaefelinNot listed | Not listed |
 Carola HöhnNot listed | Not listed |
| CCharly BergerNot listed | Not listed |
| EElli BlankNot listed | Not listed |
| WWalter DysingNot listed | Not listed |
| BBaby GraySinger | Singer |
| LLotte HassNot listed | Not listed |
 Paul HeidemannSchnäbeli, Privatdetektiv | Schnäbeli, Privatdetektiv |
 Fred ImmlerNot listed | Not listed |
| WWalter KrillaNot listed | Not listed |
 Otto KronburgerDiener des Prinzen | Diener des Prinzen |
| MMaria LojaNot listed | Not listed |
| DDr. OtaviNot listed | Not listed |
 Hans RichterMax, Pikkolo im Speisewagen | Max, Pikkolo im Speisewagen |
| AAnnemarie SchwindtNot listed | Not listed |
| HHans StiebnerNot listed | Not listed |
 Michael von NewlinskyNot listed | Not listed |
| WWolfgang von SchwindtNot listed | Not listed |