Foreign spies steal the formula for a revolutionary explosive created by an Italian scientist and to decrypt the secret code they kidnap his secretary who knows about it.
| Actor | Role |
|---|---|
 Antonio CentaMario | Mario |
 Dria PaolaSusanna | Susanna |
 Paola BarbaraOlga | Olga |
 Renato CialenteKorsanoff | Korsanoff |
 Febo MariLandi | Landi |
 Silvana JachinoDora | Dora |
| RRenzo MerusiVittorio | Vittorio |
 Carlo LombardiRam-Sci | Ram-Sci |
 Carlo DuseBlanchard | Blanchard |
 Roberto Bianchi MonteroNot listed | Not listed |
| VVirgilio BottiNot listed | Not listed |
 Giorgio CapecchiNot listed | Not listed |
| FFederico De MartinoNot listed | Not listed |
| MMaria Della Lunga MandarelliNot listed | Not listed |
| DDiana di San MarinoNot listed | Not listed |
| MMario MariNot listed | Not listed |
| MMario MolfesiNot listed | Not listed |
 Luis MotturaDupressiulles | Dupressiulles |