After three British agents are assigned to assassinate a mysterious German spy during World War I, two of them become ambivalent when their duty to the mission conflicts with their consciences.
Alternative titles: Agente secreto | Таен агент | Agente Secreto | Geheimagent | Hemmelig Agent | Agent secret | El agente secreto | Salainen asiamies | Quatre de l’espionnage | Μυστικός πράκτορας | Οι τέσσαρες της κατασκοπείας | Titkos ügynök | L’agente segreto | Amore e mistero | 間諜最後の日 | Slaptasis agentas | De geheim agent | Hemmelige agenter | Tajny agent | Bałkany | Os 4 Espiões | Agentul secret | Cei 4 spioni | Spioner i hälarna | Hemlig agent | Tajni agent | Styria vyzvedaci | Секретный агент | The Secret agent | Секретний агент | Laugh Track: Secret Agent