Stevenson, the famous English criminal expert visits Hungary with his family. While he is chairing a conference on criminology, infamous art treasure robbers steal the golden herm of Saint László. Suspicion is cast on the Stevenson children.
| Directing | Richard Thorpe | Director |
| Sound | Fred Bosch | Sound |
| Production | Alexander Paal | Producer |
| Camera | István Hildebrand | Director of Photography |
| Writing | Iván Boldizsár | Writer |
| Writing | Stanley Goulder | Writer |
| Production | Coleman T. Conroy Jr. | Executive Producer |
| Production | William R. Forman | Producer |
| Production | András Németh | Associate Producer |
| Sound | Szabolcs Fényes | Music |
| Sound | Miklós Kocsár | Music |
| Editing | Frank Clarke | Editor |
| Editing | Zoltán Kerényi | Editor |
| Art | Béla Zeichan | Production Design |
| Art | Zsuzsa Schartner | Set Decoration |
| Art | József Sáritz | Set Decoration |
| Costume & Make-Up | György Ivanicza | Makeup Artist |
| Directing | Gyula Kormos | Assistant Director |
| Directing | Peter Beale | Second Assistant Director |
| Camera | István Nyakas | Camera Operator |