Italian naval secret agents acquire a British codebook and the Italian counter-espionage agents start tracking enemy agents working undercover in Italy and providing false information.
Mara Lane
Magda
Eduardo Ciannelli
Ammiraglio Zora
Giorgio Albertazzi
Dario Saltini
Paolo Stoppa
Antiquario Bertrand
Hans Hinrich
Maurice
Franco Barbaro
Commandante Nari
Aldo Saporetti
Corrado Annicelli
Franco Caruso
Adriana Danieli
Ugo Sasso
