Nazi espionage

Directed 'Casablanca' (1942), a masterpiece exploring underground resistance and espionage during Nazi occupation with moral complexity.

Created 'Foreign Correspondent' (1940) and 'Notorious' (1946), seminal works examining Nazi spy networks and psychological tension in wartime intelligence operations.

Directed 'The Third Man' (1949), which deeply explores post-war espionage, black markets, and the moral ambiguity of intelligence operatives in occupied Europe.