World War II espionage in Lisbon with Allied safe-crackers cultivating a master spy and his wife so they can steal Japanese codes that are keys to Axis battle plans.
| Actor | Role |
|---|---|
 Robert HuttonJoe Adams | Joe Adams |
 Sandra DorneSonia | Sonia |
 Peter IllingBuergher | Buergher |
| PPeter AllenbyEdward Brentano | Edward Brentano |
 George PastellAntonio | Antonio |
 Martin BensonEdmundo Vara | Edmundo Vara |