In Barcelona, secret agent Antoine Donadieu thwarts the plans of a Nazi scientist.
Jean Marais
Antoine Donadieu
Marisa Mell
Frieda
Gérard Tichy
Matras
Howard Vernon
Le professeur
Jean Lara
Pelletier
André Cagnard
Gouferolles
Léon Zitrone
Self
José María Caffarel
Technicien de la police
Carlos Casaravilla
Varosky
Antonio Casas
Colonel
Álvaro de Luna
Hamlet
Fernando Guillén
Colonel assistant
Víctor Israel
Rico López
José Manuel Martín
Jaime
Carlos Otero
Óscar Pellicer
Mario Via
Carlos Hurtado
