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
