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