In Barcelona, secret agent Antoine Donadieu thwarts the plans of a Nazi scientist.
| Actor | Role |
|---|---|
 Jean MaraisAntoine Donadieu | Antoine Donadieu |
 Marisa MellFrieda | Frieda |
 Gérard TichyMatras | Matras |
 Howard VernonThe 'professor' | The 'professor' |
 Jean LaraPelletier | Pelletier |
 André CagnardGouferolles | Gouferolles |
 Léon ZitroneSelf | Self |
 José María CaffarelPolice Technician | Police Technician |
 Carlos CasaravillaVarosky | Varosky |
 Antonio CasasColonel | Colonel |
 Álvaro de LunaHamlet | Hamlet |
 Fernando GuillénColonel's Deputy | Colonel's Deputy |
 Víctor IsraelPolice Technician | Police Technician |
 Rico LópezAlvarez | Alvarez |
 José Manuel MartínJaime | Jaime |
 Carlos OteroNot listed | Not listed |
| ÓÓscar PellicerNot listed | Not listed |
| MMario ViaNot listed | Not listed |
| CCarlos HurtadoNot listed | Not listed |