""
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
Ion Henter
as foreign agent Spiridon Dumitrescu
Gheorghe Ionescu-Gion
Aurel Baranga
Writer
Theodor Rogalski
Music
Ion Cosma
Director of Photography
Jiřina Lukešová
Editor
Ovidiu Gologan
Titus Suru
Sound
Dinu Negreanu
Director
Yolanda Mitache
Bohuslav Kulik
Production Design
Jules Perahim
