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George Vraca as professor Dan Olteanu |
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Irina Răchițeanu as Anca Olteanu, Dan's wife |
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Jules Cazaban as colonel Jack Paleologu |
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Fory Etterle as engineer Tasca |
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Ion Lucian as Virgil Sachelarie, professor Olteanu's assistant |
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Grigore Vasiliu-Birlic as Mișu |
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Mircea Constantinescu as professor Cristea |
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Graziela Albini as |
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Sanda Costiniu as |
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Ion Henter as foreign agent Spiridon Dumitrescu |
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Gheorghe Ionescu-Gion as |
| Directing | Dinu Negreanu | Director |
| Writing | Aurel Baranga | Writer |
| Camera | Ion Cosma | Director of Photography |
| Camera | Ovidiu Gologan | Director of Photography |
| Sound | Theodor Rogalski | Music |
| Editing | Yolanda Mitache | Editor |
| Editing | Jiřina Lukešová | Editor |
| Sound | Titus Suru | Sound |
| Art | Jules Perahim | Production Design |
| Art | Bohuslav Kulik | Production Design |
