George Vraca

professor Dan Olteanu

Acting

Irina Răchițeanu

Anca Olteanu, Dan's wife

Acting

Jules Cazaban

colonel Jack Paleologu

Acting

Fory Etterle

engineer Tasca

Acting

Ion Lucian

Virgil Sachelarie, professor Olteanu's assistant

Acting

Grigore Vasiliu-Birlic

Mișu

Acting

Mircea Constantinescu

professor Cristea

Acting

Graziela Albini

Acting

Sanda Costiniu

Acting

Ion Henter

foreign agent Spiridon Dumitrescu

Acting

Gheorghe Ionescu-Gion

Acting