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