Allied — United Kingdom
Max and Marianne settle in wartime London — where Max is told his wife may be a German spy and is ordered to test her.
The SOE and MI6 ran extensive counter-intelligence operations in wartime London. German attempts to infiltrate agents into Britain were largely thwarted through double-agent operations — the Double Cross system turned nearly every German spy in Britain into a double agent by 1941. The film's scenario of a suspected spousal spy was a real wartime fear.